Sensory Processing Dysfunction in the Personal Experience and Neuronal Machinery of Schizophrenia
Open accessAbstract
Sensory processing deficits, first investigated by Kraeplin and Bleuler as possible pathophysiological mechanisms in schizophrenia, are now being re-characterized in the context of modern understanding of the involved molecular and neurobiological brain mechanisms. The National Institute of Mental Health Research Domain Criteria position these deficits as intermediaries between molecular and cellular mechanisms and clinical symptoms of schizophrenia such as hallucinations. The pre-pulse inhibition of startle responses by a weaker preceding tone, the inhibitory gating of response to paired sensory stimuli characterized using the auditory P50 evoked response, and the detection of slightly different stimuli that elicits the cortical Mismatch Negativity potential demonstrate deficits in early sensory processing mechanisms, whose molecular and neurobiological bases are increasingly well understood. Deficits in sensory processing underlie more complex cognitive dysfunction and, vice versa, are affected by higher-level cognitive difficulties. These deficits are now being used to identify genes involved in familial transmission of the illness and to monitor potentially therapeutic drug effects for both treatment and prevention. This research also provides a clinical reminder that patients’ sensory perception of the surrounding world, even during treatment sessions, may differ considerable from others’ perceptions. A person’s ability to understand and interact effectively with surroun…
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- Findingcitation
Patients required longer time to detect a target (critical stimulus duration) in visual backward masking studies.
“Subsequent studies of visual backward masking(87) demonstrated that patients not only required longer time to detect a target, a parameter termed “critical stimulus duration,””
Quote in the paperSubstantial claim0 of 1 sources checked- cites [87] source
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- Findingcitation
MMN deficits are heritable across the general population.
“Like P50 and PPI deficits, MMN deficits are heritable across the general population (66).”
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- Findingcitation
Holzman observed that both patients and their unaffected family members showed more variability of eye movement during eye tracking than did healthy volunteers.
“Nevertheless, modern studies of visual processing in schizophrenia were not conducted until the 1960’s when Holzman observed that both patients and their unaffected family members showed more variability of eye movement during eye tracking than did healthy volunteers (85, 86).”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
Patients with schizophrenia show deficits in generation of other cortical auditory responses, such as the auditory steady-state response to rapidly presented stimuli.
“In addition to MMN deficits, patients with schizophrenia also show deficits in generation of other cortical auditory responses, such as the auditory steady-state response to rapidly presented stimuli (rev. in 71).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [71] source
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- Findingcitation
Impairments in MMN continue to develop over initial stages of the illness.
“In keeping with the continued maturation of auditory cortex in adolescence (Figure 1A), impairments in MMN continue to develop over initial stages of the illness (69)”
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- Findingcitation
Similar effects of nicotinic agonists on MMN deficits are observed in schizophrenia.
“with similar effects observed in schizophrenia (39).”
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- Findingcitation
Deficits in MMN generation correlate highly with overall level of function.
“Deficits in MMN generation correlate highly with overall level of function (64)”
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- Findingcitation
In persons at high clinical risk for schizophrenia, MMN has emerged as a predictor of who will progress to schizophrenia.
“In persons at high clinical risk for schizophrenia, MMN has emerged as a predictor of who will progress to schizophrenia (rev. in 67)”
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- Findingcitation
Similar reductions in phonological reading ability have been observed in patients with established, but not prodromal, schizophrenia.
“Recently, similar reductions in phonological reading ability have been observed in patients with established, but not prodromal, schizophrenia”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [81] source
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- Findingcitation
Deficits in tone matching contribute significantly to ability to detect emotional prosody.
“Deficits in tone matching contribute significantly to ability to detect emotional prosody (74, 75)”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
Impairments in MMN develop in parallel with progressive volume reduction within auditory brain regions.
“in parallel with progressive volume reduction within auditory brain regions (70).”
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- Findingcitation
Nearly 50% of schizophrenia patients test positive on standardized tests of musical ability, such as the Montreal Battery for Evaluation of Amusia, vs. only 10% of the general population.
“When tested on a standardized tests of musical ability, such as the Montreal Battery for Evaluation of Amusia (78), nearly 50% of schizophrenia patients test positive vs. only 10% of the general population (79)”
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- cites [79] Kantrowitz JT, Psychol Med
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- Findingcitation
Deficits in MMN generation are associated with impairments of basic auditory discrimination, such as tone matching and auditory spatial discrimination.
“On a behavioral level, deficits in MMN generation are associated with impairments of basic auditory discrimination, such as tone matching (3) and auditory spatial discrimination (49)”
Quote in the paperSubstantial claim0 of 2 sources checked - Findingcitation
Deficits in tone matching contribute significantly to communications such as sarcasm that require patients to appreciate what another person may be thinking (theory of mind).
“as well as to communications such as sarcasm that require patients to appreciate what another person may be thinking (76, 77), a trait called “theory of mind”, a form of empathy.”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
Patients showed more sensitivity to masking of the stimulus by a later, more intense stimulus.
“but also showed more sensitivity to masking of the stimulus by a later, more intense stimulus, suggesting impaired interplay between different visual pathways (88).”
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- Findingcitation
Kraeplin and colleagues observed that dementia praecox patients showed severe deficits in detecting stimuli presented for brief (20 ms) durations.
“Using the newly invented photographic shutter, Kraeplin and colleagues observed that dementia praecox patients showed severe deficits in detecting stimuli presented for brief (20 ms) durations, confirming even earlier findings with a rotating striped drum apparatus (84).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [84] Busch A, 1908
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- Findingcitation
Deficits in MMN generation, particularly to duration deviants, are prominent in developmental dyslexia.
“Deficits in MMN generation, particularly to duration deviants, are also prominent in developmental dyslexia”
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- Findingcitation
Deficits in MMN generation correlate highly with age at which symptoms of the illness first appear.
“and age at which symptoms of the illness first appear (65).”
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- Findingcitation
Ketamine-induced deficits in MMN generation are reversed by nicotinic agonists.
“However, as with P50 gating, ketamine-induced deficits in MMN generation are reversed by nicotinic agonists (57)”
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- Findingcitation
Deficits in visual processing are consistently observed not only in schizophrenia patients but also in unaffected family members.
“As in the early Holzman studies, deficits in visual processing are consistently observed not only in schizophrenia patients but also in unaffected family members”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [95] source
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- Findingcitation
Visual reading deficits extend to unaffected family members.
“as well as to unaffected family members (106).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [106] source
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- Findingcitation
In schizophrenia, this framing function is lost due to impaired transmission within the magnocellular visual system.
“In schizophrenia, this framing function is lost due to impaired transmission within the magnocellular visual system (98)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [98] source
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- Findingcitation
Deficits in PPI appear in conditions other than schizophrenia, including bipolar disorder and Huntington's disease.
“For example, deficits in PPI appears in conditions other than schizophrenia, including bipolar disorder (109) and Huntington’s disease (110)”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
These passage reading deficits correlate with both behavioral and fMRI-based assessment of visual magnocellular function.
“that correlate with both behavioral (106, 107) and fMRI-based (108) assessment of visual magnocellular function.”
Quote in the paperSubstantial claim0 of 3 sources checked - Findingcitation
ASD patients show particular deficits in multisensory facilitation.
“ASD patients show particular deficits in multisensory facilitation”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
Patients may have superior, rather than reduced, performance in basic unimodal functions such as pitch processing or visual search capabilities that are impaired in schizophrenia.
“Similarly, patients may have superior, rather than reduced, performance in basic unimodal functions such as pitch processing (115) or visual search capabilities (116) that are impaired in schizophrenia.”
Quote in the paperNot a substantial claim0 of 2 sources checked - Findingcitation
P50 deficits may be associated with psychotic mania and childhood autism spectrum disorder (ASD).
“Similarly, P50 deficits may be associated with psychotic mania and childhood autism spectrum disorder (ASD), consistent with impairments in excitatory/inhibitory balance (111, 112).”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [111] Franks RD, 1983, Biol Psychiatry
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- cites [112] source
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- Findingcitation
Impaired activation of visual regions has been observed in meta-analyses of visual working memory tasks.
“impaired activation of visual regions has been observed in meta-analyses of visual working memory tasks (93)”
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- Findingcitation
Neurophysiological studies have demonstrated impaired generation of the visual P1 potential to stimuli biased toward the magnocellular visual system.
“Neurophysiological studies have demonstrated impaired generation of the visual P1 potential to stimuli biased toward the magnocellular visual system (65, 89–91)”
Quote in the paperSubstantial claim0 of 4 sources checked - Findingcitation
MMN appears to be differentially impaired in schizophrenia relative to either bipolar disorder or depression.
“By contrast, MMN appears to be differentially impaired in schizophrenia relative to either bipolar disorder or depression (113).”
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- Findingcitation
In higher functioning ASD, alterations are found in consistency, although not in overall amplitude, of unimodal sensory response.
“In higher functioning ASD alterations are found in consistency, although not in overall amplitude, of unimodal sensory response (114).”
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- Findingcitation
Loss of framing function leads to impaired ability to discriminate facial emotion.
“but also to impaired ability to discriminate facial emotion (99)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [99] source
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- Findingcitation
Visual reading deficits extend to individuals at clinical high risk for schizophrenia.
“Consistent with other visual findings, visual reading deficits extend to individuals at clinical high risk for schizophrenia (81)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [81] source
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- Findingcitation
Deficits in sensory response are observed even in the absence of the attentional impairments.
“Overall, deficits in sensory response are observed even in the absence of the attentional impairments (94)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [94] source
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- Findingcitation
Loss of framing function leads to impaired ability to recognize fragmented objects.
“leading not only to impaired ability to recognize fragmented objects”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [98] source
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Individuals with congenital amusia, like schizophrenia patients, show impaired auditory emotion recognition.
“Individuals with congenital amusia, like schizophrenia patients, show impaired auditory emotion recognition (79)”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [79] Kantrowitz JT, Psychol Med
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- Findingreasoning
Loss of framing function leads to impaired ability to engage in tasks that require sustained attention to visual information.
“or to engage in tasks that require sustained attention to visual information (91, 100).”
Quote in the paperSubstantial claim0 of 2 sources checked - Findingcitation
The first clinical report of chlorpromazine's effects in schizophrenia included its effects on the patients' sensory perception of their environment, described by Delay and Deniker as "apparent indifference or the slowing of responses to external stimuli," in contrast to their baseline state of hyper-excitability.
“The first clinical report of chlorpromazine’s effects in schizophrenia included its effects on the patients’ sensory perception of their environment, described by Delay and Deniker as “apparent indifference or the slowing of responses to external stimuli,” in contrast to their baseline state of hyper-excitability (120).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [120] Delay J, 1955, J Clin Exp Psychopathol
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- Findingnone given
Many of these abnormalities are manifest before the onset of clinical signs of psychosis.
“Many of these abnormalities are manifest before the onset of clinical signs of psychosis.”
Quote in the paperNot a substantial claim - Premisecitation
Patients with schizophrenia report globally distorted perceptions of their world that underlie their psychotic symptoms.
“Yet patients report instead more globally distorted perceptions of their world that underlie their psychotic symptoms.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [1] Saks ER, 2007
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- Premisecitation
Most clinical tests of auditory function, such as audiological assessments or far field brainstem potentials, test the most peripheral portions of the inner ear and auditory nerve leading to the brainstem, which do not appear to be affected in schizophrenia.
“Most clinical tests of auditory function, such as audiological assessments or far field brainstem potentials, are tests of the most peripheral portions of the system in the inner ear and the auditory nerve leading to the brainstem, which do not appear to be affected in schizophrenia (6).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [6] source
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- Interpretationreasoning
Dysfunction within cortical regions may contribute to the complex patterns of social and communicative disturbance observed in schizophrenia.
“Dysfunction within the cortical regions may thus contribute to the complex patterns of social and communicative disturbance observed in schizophrenia.”
Quote in the paperSubstantial claim - Premisecitation
A weak tone initiates habituation of the reticular neurons' response to a successive louder tone, leading to prepulse inhibition of the acoustic startle response.
“A weak tone initiates habituation of the reticular neurons’ response to a successive louder tone, leading to the phenomenon of prepulse inhibition (PPI) of the acoustic startle response (7, 8).”
Quote in the paperSubstantial claim0 of 2 sources checked - Premisenone given
Results of event-related potential studies are strongly corroborated by behavioral and neuroimaging measures that provide additional information about the location and nature of underlying cortical impairments.
“Results of these event-related potential studies, however, are strongly corroborated by both behavioral and neuroimaging based measures that provide additional information regarding location and nature of underlying cortical impairments (Table 1).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites Table 1
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- Interpretationreasoning
Basic perceptual disturbances in schizophrenia are a basis for the more bizarre distortions of reality that lead to clinical diagnosis of schizophrenia and other psychoses.
“We may easily overlook these basic perceptual disturbances in diagnostic interviews, yet they are a basis for the more bizarre distortions of reality that lead to clinical diagnosis of schizophrenia and other psychoses.”
Quote in the paperSubstantial claim - Interpretationreasoning
Because basic sensory systems have been extensively characterized in humans and animal models, patterns of deficit can be directly linked to underlying biology.
“because basic sensory systems have been extensively characterized not only in humans but also in animal models, patterns of deficit can be directly linked to underlying biology.”
Quote in the paperSubstantial claim - Interpretationreasoning
In schizophrenia, both the attentional and informational roles of the sensory systems are impaired, contributing to the overall pattern of symptoms and neurocognitive deficits associated with schizophrenia.
“In schizophrenia, both the attentional and informational roles of the sensory systems are impaired, contributing to the overall pattern of symptoms and neurocognitive deficits we frequently associate with schizophrenia”
Quote in the paperSubstantial claim - Interpretationreasoning
Deficits in processing the simplest stimuli found in schizophrenia may underlie more complex hallucinations and delusions.
“Deficits in processing the simplest stimuli found in schizophrenia may underlie more complex hallucinations and delusions, as for Professor Saks, in two ways”
Quote in the paperSubstantial claim - Premisenone given
Deficits in sensory processing are most effectively demonstrated using neurophysiological measures such as event-related potentials, which trace information flow from sense organs through brainstem and subcortical regions into sensory and higher cortical regions.
“Deficits in sensory processing are most effectively demonstrated using neurophysiological measures such as event-related potentials, which uniquely trace the flow of information from sense organs, through brainstem and subcortical regions, and into sensory and then higher cortical brain regions.”
Quote in the paperSubstantial claim - Premisenone given
Deficits in the integrity of both PPI and P50 gating in schizophrenia have been extensively replicated since their first demonstrations, pointing to dysfunction even within low-level circuits.
“Deficits in the integrity of both PPI and P50 gating in schizophrenia have been extensively replicated since their first demonstrations, pointing to dysfunction even within these low level circuits.”
Quote in the paperSubstantial claim - Interpretationreasoning
Neuropsychologically, failure to register basic sensory information correctly makes poor decisions about it inevitable.
“neuropsychologically, failure to register basic sensory information correctly makes poor decisions about it inevitable”
Quote in the paperNot a substantial claim - Premisecitation
The deficit in PPI is most prominent in schizophrenia when the weaker tone precedes the startling sound by 60 msec.
“The deficit in PPI is most prominent in schizophrenia when the weaker tone precedes the startling sound by 60 msec (7).”
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- Premisecitation
The initial proof of principle for several α7-nicotinic receptor agonists included the demonstration of normalization of P50 inhibition in schizophrenia.
“The initial proof of principle for several of the agents included the demonstration of normalization of P50 inhibition in schizophrenia (39).”
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- Premiseown data
Patients with schizophrenia, either unmedicated or treated with most antipsychotic drugs, have reduced inhibition of the P50 auditory evoked potential.
“Patients with schizophrenia, either unmedicated or treated with most antipsychotic drugs, also have reduced inhibition of the P50 auditory evoked potential (Figure 2A).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites Figure 2A
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- Premisenone given
In the perinatal period, α7-nicotinic receptors are critical to the development of cerebral inhibition.
“In the perinatal period, α7-nicotinic receptors are critical to the development of cerebral inhibition.”
Quote in the paperSubstantial claim - Premisecitation
At least one compound is presently in late stage clinical testing, with definitive results expected within the next several years.
“Nevertheless, at least one compound is presently in late stage clinical testing, with definitive results expected within the next several years (42).”
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- Premisecitation
P50 deficits are already present in many newborn infants of parents with schizophrenia.
“P50 deficits are already present in many newborn infants of parents with schizophrenia Table 2; (43).”
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- Premisecitation
Both PPI and P50 deficits have been associated with entire networks of genetic variants in schizophrenia in the NIMH Consortium of Genetics Studies of Schizophrenia study.
“As the scope of genomic analysis has increased, both deficits have been associated with entire networks of genetic variants in schizophrenia in the NIMH Consortium of Genetics Studies of Schizophrenia study, which examines the relationships of these phenotypes to the cognitive and genetic aspects of schizophrenia (28).”
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Mouse and rat analogues of PPI and P50 deficits can be produced.
“Although schizophrenia cannot be re-produced in animals, mouse and rat analogues of PPI and P50 deficits can be produced.”
Quote in the paperSubstantial claim- Rests on an assumption: Schizophrenia cannot be reproduced in animals.
- Premisecitation
Neuregulin helps assemble both α-nicotinic and N-methyl-D-aspartate-type glutamate receptors.
“Neuregulin helps assemble both α-nicotinic and N-methyl-D-aspartate-type glutamate receptors (NMDARs) (30)”
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- Premisenone given
Choline, in the millimolar concentrations found in amniotic fluid, activates α7-nicotinic receptors.
“Choline, in the millimolar concentrations found in amniotic fluid, activates α7-nicotinic receptors.”
Quote in the paperSubstantial claim - Premisecitation
Several investigations in patients themselves have not shown an association between P50 inhibition and self-reports of sensory gating difficulties.
“Thus, several investigations in patients themselves have not shown association between P50 inhibition and self-reports of sensory gating difficulties (19)”
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- Premisecitation
Deficits in both PPI and P50 gating are found in schizotypal individuals who have a family history of schizophrenia and in adolescents at high risk for schizophrenia.
“Deficits in both PPI and P50 gating are found in schizotypal individuals who have a family history of schizophrenia and in adolescents at high risk for schizophrenia (23–25).”
Quote in the paperSubstantial claim0 of 3 sources checked - Premisecitation
Increased dopaminergic neurotransmission from stimulants and psychotomimetic antagonists of NMDARs such as phencyclidine induce the PPI/P50 deficit pharmacologically.
“Increased dopaminergic neurotransmission from stimulants and psychotomimetic antagonists of NMDARs such as phencyclidine (PCP) induce the deficit pharmacologically (8).”
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- Premisecitation
Deficits in development of P50 inhibition in newborns are correlated with the first appearance of attention deficit symptoms in later childhood.
“Deficits in development of P50 inhibition in newborns are correlated with the first appearance of attention deficit symptoms in later childhood (45).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [45] Hutchison AK, J Atten Disord
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- Premisecitation
Clozapine, unlike other antipsychotics, significantly normalizes P50 inhibition, through increased release of acetylcholine in the hippocampus and resultant indirect activation of α7-nicotinic receptors on inhibitory interneurons.
“Clozapine, unlike other antipsychotics, significantly normalizes P50 inhibition, through increased release of acetylcholine in the hippocampus and the resultant indirect activation of α7-nicotinic receptors on inhibitory interneurons (38).”
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- Premisecitation
The primary auditory cortex contains different regions that support the extraction of different features, including the localization of the source versus the content of sounds.
“The primary auditory cortex contains different regions, which support the extraction of these different features, including the localization of the source vs. the content of sounds (46).”
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Dietary supplementation of choline stimulates the development of cerebral inhibition as measured by P50 inhibition after birth.
“Dietary supplementation of choline stimulates the development of cerebral inhibition as measured by P50 inhibition after birth (44).”
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- Premisecitation
The N100 also shows impaired gating in schizophrenia.
“The N100 also shows impaired gating in schizophrenia (12).”
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Polymorphisms of CHRNA7 have been associated with PPI.
“Polymorphisms of CHRNA7 have been associated with PPI as well (27).”
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Cigarette smoking increases P50 inhibition and PPI in schizophrenia.
“Cigarette smoking increases P50 inhibition and PPI in schizophrenia (35).”
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- Premisenone given
Schizophrenia has not been linked to a single major gene.
“As a complex genetic illness, schizophrenia has not been linked to a single major gene.”
Quote in the paperNot a substantial claim - Premisecitation
Nicotine itself, acting through α7-nicotinic receptors, is the mechanism of effects on P50 inhibition.
“Further animal and clinical investigation confirmed nicotine itself, acting through α7-nicotinic receptors, as the mechanism of effects on P50 inhibition (36, 37).”
Quote in the paperSubstantial claim0 of 2 sources checked - Premisecitation
Stimulation of auditory regions induces auditory hallucinations similar to those of schizophrenia.
“it has been known since Penfield (47) that stimulation of auditory regions induces auditory hallucinations similar to those of schizophrenia.”
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- Premisecitation
The association between patients' self-report of sensory phenomena and physiological measures is confounded by their psychopathology.
“The association between patients’ self-report of sensory phenomena and physiological measures is confounded by their psychopathology (18).”
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PPI deficits have been correlated with deficient social perception.
“PPI deficits have been correlated with deficient social perception (22).”
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Unlike PPI, MMN generation is little affected by either dopaminergic or serotonergic manipulations.
“Unlike PPI, MMN generation is little affected by either dopaminergic or serotonergic manipulations (56).”
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- Interpretationcitation
Impaired ability to detect vocal intonation may contribute significantly to impaired social function.
“Consequently, impaired ability to detect vocal intonation may contribute significantly to impaired social function (73).”
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- Premisecitation
Auditory hallucinations in schizophrenia are increasingly tied to auditory cortex function.
“Consistent with this literature, auditory hallucinations in schizophrenia are increasingly tied to auditory cortex function.”
Quote in the paperSubstantial claim - Interpretationcitation
Impaired interplay between different visual pathways is suggested by visual backward masking findings.
“suggesting impaired interplay between different visual pathways (88).”
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- Premisecitation
Hallucinations are accompanied by objective hyperactivity of left-sided auditory regions.
“For example, hallucinations are accompanied by objective hyperactivity of left sided auditory regions (48).”
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Magnocellular neuron properties depend heavily upon function of NMDARs within both subcortical and cortical visual regions.
“These properties depend heavily upon function of NMDARs within both subcortical and cortical visual regions (83).”
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- Interpretationcitation
MMN deficits in developmental dyslexia reflect impaired ability to perform phonological operations required for successful reading.
“reflecting impaired ability to perform phonological operations (i.e. “sounding out” words) required for successful reading (80).”
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Increased ability of the left hemisphere to localize sound in the right side of space correlates with increased severity of hallucinations.
“Similarly, increased ability of the left hemisphere to localize sound in the right side of space correlate with increased severity of hallucinations (49).”
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- Premisecitation
Other compounds that may reverse MMN deficits in schizophrenia include N-acetylcysteine and D-serine.
“Other compounds that may reverse MMN deficits in schizophrenia include N-acetylcysteine, a precursor of the brain antioxidant glutathione (59) and D-serine, an endogenous NMDAR modulator (60).”
Quote in the paperNot a substantial claim0 of 2 sources checked - Premisereasoning
Routine clinical visual testing, such as use of an eye chart, does not adequately assess potential disturbances in schizophrenia.
“As with the auditory system, routine clinical visual testing, such as use of an eye chart, does not adequately assess potential disturbances in schizophrenia.”
Quote in the paperSubstantial claim - Interpretationcitation
Progressive reductions in auditory function during the peri-onset period may result in a significant regression in reading ability in schizophrenia from premorbid levels.
“suggesting that progressive reductions in auditory function during the peri-onset period may result in a significant regression in reading ability in schizophrenia from premorbid levels (81).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [81] source
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- Premisecitation
MMN has been tied to impaired neurotransmission at NMDARs based upon both intracranial and surface recordings in non-human primates and ketamine challenge studies in healthy human volunteers.
“MMN has been tied to impaired neurotransmission at NMDARs based upon both intracranial (54) and surface (55) recordings in non-human primates and ketamine challenge studies in healthy human volunteers (rev. in 3).”
Quote in the paperSubstantial claim0 of 3 sources checked - Premisecitation
Similar deficits in auditory dysfunction may be detected using fMRI to evaluate response to stimulus change within auditory cortical regions.
“Although the majority of studies of auditory dysfunction in schizophrenia have used neurophysiological measures such as MMN, similar deficits may be detected using fMRI to evaluate response to stimulus change within auditory cortical regions (68).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [68] source
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- Interpretationreasoning
Patients make less efficient use of sensory processing resources.
“and so make less efficient use of sensory processing resources (72).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [72] source
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- Interpretationreasoning
Processes that rely on the synergistic interplay between auditory and visual systems should be most affected in schizophrenia.
“Given the parallel deficits in auditory and visual function, processes that rely on the synergistic interplay between these systems should be most affected in schizophrenia.”
Quote in the paperSubstantial claim - Interpretationcitation
Low level visual deficits cascade up the system to undermine higher order cognitive impairments, as in the auditory system.
“supporting recent suggestions that low level visual deficits cascade up the system to undermine higher order cognitive impairments, as in the auditory system (3).”
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Not checked in the free run.
- Interpretationcitation
In schizophrenia, the parallel deficits in auditory and visual processing combine to produce a double deficit pattern of dyslexia that leads to significant impairments in socioeconomic outcome.
“In schizophrenia, the parallel deficits in auditory and visual processing combine to produce a “double deficit” pattern of dyslexia that leads to significant impairments in socioeconomic outcome (81).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [81] source
Not checked in the free run.
- Premisecitation
The ability to close objects based upon fragmented information depends upon rapid transmission of low resolution information through the magnocellular/dorsal stream visual system to prefrontal cortex even in advance of more detailed information reaching ventral stream visual cortex via the parvocellular visual system.
“This process, often referred to as the “cat behind the Venetian blind effect,” depends upon rapid transmission of low resolution information through the magnocellular/dorsal stream visual system to prefrontal cortex even in advance of more detailed information reaching ventral stream visual cortex via the parvocellular visual system (96, 97).”
Quote in the paperSubstantial claim0 of 2 sources checked - Interpretationcitation
The confluence of auditory and visual emotion processing deficits contributes in parallel to the social disconnection of schizophrenia patients.
“suggesting that the confluence of deficits contributes in parallel to the social disconnection of schizophrenia patients.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [74] source
Not checked in the free run.
- Interpretationreasoning
Individuals with congenital amusia may compensate using visual cues and higher order cognitive reasoning.
“but nevertheless may compensate using visual cues and higher order cognitive reasoning.”
Quote in the paperNot a substantial claim - Interpretationcitation
Visual processing deficits represent a possible heritable vulnerability factor for schizophrenia.
“suggesting that they represent a possible heritable vulnerability factor for the disorder (95).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [95] source
Not checked in the free run.
- Interpretationcitation
PPI deficits in bipolar disorder and Huntington's disease are consistent with the hyperarousal often seen in these conditions.
“consistent with the hyperarousal often seen in these conditions.”
Quote in the paperNot a substantial claim0 of 2 sources checked - Interpretationreasoning
Loss of this framing function may serve as a physiological substrate for this common perceptual experience.
“Loss of this framing function may serve as a physiological substrate for this common perceptual experience.”
Quote in the paperSubstantial claim - Interpretationcitation
Visual deficits are more likely a cause than consequence of attentional dysfunction.
“suggesting that visual deficits are more likely a cause than consequence of attentional dysfunction.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [94] source
Not checked in the free run.
- Interpretationcitation
P50 deficits in psychotic mania and ASD are consistent with impairments in excitatory/inhibitory balance.
“consistent with impairments in excitatory/inhibitory balance (111, 112).”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [111] Franks RD, 1983, Biol Psychiatry
Not checked in the free run.
- cites [112] source
Not checked in the free run.
- Premisecitation
The magnocellular visual system plays a critical role in organizing visual space during reading of connected passages of text, such as paragraphs.
“Similarly, the magnocellular visual system plays a critical role in organizing visual space during reading of connected passages of text, such as paragraphs (103, 104).”
Quote in the paperNot a substantial claim0 of 2 sources checked - Interpretationreasoning
The result is a loss of connection to people and the environment experienced by many patients especially during the chronic phases.
“The result is a loss of connection to people and the environment experienced by many patients especially during the chronic phases.”
Quote in the paperSubstantial claim - Interpretationnone given
The cognitive dysfunction of schizophrenia encompasses a profound disturbance in sensory processing.
“The cognitive dysfunction of schizophrenia encompasses a profound disturbance in sensory processing.”
Quote in the paperSubstantial claim - Premisecitation
Sensory processing measures are included within the Research Domain Criterion initiative.
“Sensory processing measures are included within this initiative”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [119] source
Not checked in the free run.
- May combine two claims. 39
- Classified as probably not a substantial claim. 19
May combine two claims.
FindingcitationDeficits in MMN generation were first reported in the early 1990s and have since been a widely replicated neurophysiological finding in schizophrenia.
“Deficits in MMN generation were first reported in the early 1990’s, and this finding has since been a widely replicated neurophysiological finding in schizophrenia (rev. in 3, 61, 62, 63)”
Quote in the paperNot a substantial claim0 of 3 sources checkedMay combine two claims.
FindingcitationDeficits in P50 gating and PPI are both associated with increased severity of auditory hallucinations.
“Consistent with this hypothesis, deficits in P50 gating and PPI are both associated with increased severity of auditory hallucinations (51, 52).”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
FindingcitationIn schizophrenia, the auditory and visual emotion processing deficits are correlated but independent.
“In schizophrenia, the auditory and visual emotion processing deficits are correlated but independent (74)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [74] source
Not checked in the free run.
May combine two claims.
FindingcitationPatients during the early stages of schizophrenia often experience visual illusions and feelings that images are fragmentary.
“Patients during the early stages of schizophrenia often experience visual illusions and feelings that images are fragmentary (101, 102).”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
FindingcitationImpaired activation has been observed to low spatial frequency stimulation, along with visual behavioral deficits.
“Nevertheless, impaired activation have been observed to low spatial frequency stimulation (91, 92), along with visual behavioral deficits.”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
FindingcitationSchizophrenia patients show severe deficits in passage, but not single word, reading.
“As predicted, schizophrenia patients show severe deficits in passage, but not single word, reading (105)”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [105] source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Findingnone givenIf the clinician can communicate that many patients find colors may seem more intense, visual perception may be more fragmented, and sounds may seem too loud or too intrusive, patients are often relieved that their situation is understood.
“If the clinician can communicate that many patients find colors may seem more intense, visual perception may be more fragmented, and sounds may seem too loud or too intrusive, patients are often relieved that their situation is understood.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.
Findingnone givenPatients are often disturbed by their sensory distortions, but may not volunteer this information to clinicians, particularly if they are already developing parnaoia.
“Patients are often disturbed by their sensory distortions, but may not volunteer this information to clinicians, particularly if they are already developing parnaoia.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S4 (based).
Findingnone givenDeficits in visual function are tied to impaired facial discrimination and reading.
“Deficits in visual function are tied to impaired facial discrimination and reading.”
Quote in the paperNot a substantial claimMay combine two claims.
FindingcitationPersistent abnormalities in P50 gating are associated with impaired ability to focus attention on specific tasks, a cognitive deficit associated with poor psychosocial rehabilitation.
“Persistent abnormalities in P50 gating are associated with impaired ability to focus attention on specific tasks, a cognitive deficits associated with poor psychosocial rehabilitation (16).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [16] source
Not checked in the free run.
May combine two claims.
FindingcitationDeficits in MMN are tied to impairments in both orientation to critical environmental events and detection of the sensory modulations that are used to communicate social information such as emotion or attitude by tone of voice.
“Deficits in MMN are tied to impairments in both orientation to critical environmental events and detection of the sensory modulations that are used to communicate social information such as emotion or attitude by tone of voice (3).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [3] source
Not checked in the free run.
May combine two claims.
InterpretationreasoningDeficits in auditory and visual sensory processing may not fully explain patients' psychotic experience, but they are a paradigmatic example of research guided by patients' own descriptions of their experience of the world.
“Deficits in auditory and visual sensory processing may not fully explain patients’ psychotic experience, but they are a paradigmatic example of research that has been guided by patients’ own descriptions of their experience of the world.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationThe P50 response to the second of paired stimuli is decreased relative to the first in normal persons, an example of inhibitory sensory gating.
“The P50 response to the second of paired stimuli in is decreased relative to the first in normal persons, an example of inhibitory sensory gating (10).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [10] Freedman R, 1983, Biol Psychiatry
Not checked in the free run.
May combine two claims.
InterpretationreasoningMuch sensory processing occurs outside conscious awareness, so unless it is specifically tested patients will be unaware of their deficits.
“Much of this processing occurs outside the realm of conscious awareness, so unless it is specifically tested patients will be unaware of their deficits.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S4 (based). May combine two claims.
Premisenone givenReticular neurons have rapidly habituating responses to repeated stimulation and form the brain's initial sensory gating mechanism, preventing other brain regions from being flooded with repeated and presumed less important sensory information.
“Reticular neurons have rapidly habituating responses to repeated stimulation and thus form the brain’s initial sensory gating mechanism, which prevents other brain regions from being flooded with repeated and presumed less important sensory information”
Quote in the paperNot a substantial claimMay combine two claims.
InterpretationreasoningSensory processing deficits are now being used to identify genes involved in familial transmission of schizophrenia and to monitor potentially therapeutic drug effects for treatment and prevention.
“These deficits are now being used to identify genes involved in familial transmission of the illness and to monitor potentially therapeutic drug effects for both treatment and prevention.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S4 (based).
Premisenone givenIn humans, the largest initial cerebral response to an auditory stimulus is a positive wave at 50 ms, termed the P50 potential.
“In humans, the largest initial cerebral response to an auditory stimulus is a positive wave that occurs at 50 ms and is thus termed the P50 potential.”
Quote in the paperNot a substantial claimMay combine two claims.
Premisenone givenPre-pulse inhibition, P50 inhibitory gating, and mismatch negativity demonstrate deficits in early sensory processing mechanisms in schizophrenia.
“The pre-pulse inhibition of startle responses by a weaker preceding tone, the inhibitory gating of response to paired sensory stimuli characterized using the auditory P50 evoked response, and the detection of slightly different stimuli that elicits the cortical Mismatch Negativity potential demonstrate deficits in early sensory processing mechanisms”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationreasoningDeficits in sensory processing underlie more complex cognitive dysfunction and are also affected by higher-level cognitive difficulties.
“Deficits in sensory processing underlie more complex cognitive dysfunction and, vice versa, are affected by higher-level cognitive difficulties.”
Quote in the paperSubstantial claimMay combine two claims.
PremisereasoningMany neurotransmitter mechanisms most associated with schizophrenia, such as glutamate, GABA, dopamine and acetylcholine, as well as their receptors, are widely distributed throughout the brain, as are many associated risk genes, suggesting their effects on brain function should be equally detectable across brain regions.
“many of the neurotransmitter mechanisms most associated with schizophrenia, such as glutamate, GABA, dopamine and acetylcholine, as well as their receptors, are widely distributed throughout brain as are many of the associated risk genes, suggesting that their effects on brain function should be equally detectable across brain regions.”
Quote in the paperSubstantial claimMay combine two claims.
Premisenone givenThe inhibition of the second stimulus is maximal at 500 msec, later than the maximal PPI interval of 60 msec.
“The inhibition of the second stimulus is maximal at 500 msec, later than the maximal PPI interval of 60 msec.”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationcitationThere is convergence between the genetic findings and the neurobiological model, corroborated by postmortem findings of decreased α7-nicotinic receptors in schizophrenia.
“Thus, there is convergence between the genetic findings and the neurobiological model, corroborated by postmortem findings of decreased α7-nicotinic receptors in schizophrenia (31).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [31] source
Not checked in the free run.
May combine two claims.
PremisecitationThe NRG1-induced deficits do not appear until adolescence, modeling the time course of onset of schizophrenia.
“Intriguingly, the NRG1-induced deficits do not appear until adolescence (33), modeling the time course of onset of schizophrenia. (34)”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationFor both PPI and P50 gating, despite the origin of the effect in reticular brain stem neurons, the response engages an entire network of brain circuits, the dopaminergic circuits of the basal ganglia for PPI and the basal cholinergic nuclei and cortex for P50 gating.
“For both PPI and P50 gating, despite the origin of the effect in reticular brain stem neurons, the response engages an entire network of brain circuits, the dopaminergic circuits of the basal ganglia for PPI and the basal cholinergic nuclei and cortex for P50 gating (8, 9).”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationThe α7-nicotinic receptor is found presynaptically on glutamate nerve terminals and postsynaptically on inhibitory interneurons, particularly in the hippocampus and nucleus reticularis thalamis.
“The α7-nicotinic receptor is found presynaptically on glutamate nerve terminals and postsynaptically on inhibitory interneurons (Figure 2B), particularly in the hippocampus and nucleus reticularis thalamis (9).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [9] source
Not checked in the free run.
May combine two claims.
PremisereasoningCholinergic inputs do not reach the hippocampus until shortly before birth, so they are not stimulated by synaptically released acetylcholine.
“However, cholinergic inputs do not reach the hippocampus until shortly before birth. Therefore, they are not stimulated by synaptically released acetylcholine.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationIn families affected with multiple cases of schizophrenia, the deficit in P50 gating segregates as an autosomal dominant and is linked to the CHRNA7 gene complex, which forms the α7-nicotinic acetylcholine receptor.
“In families affected with multiple cases of schizophrenia, the deficit in P50 gating segregates as an autosomal dominant and is linked to the CHRNA7 gene complex, which forms the α7-nicotinic acetylcholine receptor (26).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [26] source
Not checked in the free run.
May combine two claims.
InterpretationcitationIn many patients the PPI and P50 gating deficits do not occur together, and thus they represent distinct aspects of pathophysiology.
“In many patients the two deficits do not occur together, and thus they represent distinct aspects of pathophysiology (11).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [11] source
Not checked in the free run.
May combine two claims.
Premisenone givenThe PPI deficit is more pronounced in women, who normally show less inhibition than men.
“The deficit is more pronounced in women, who normally show less inhibition than men.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationDeficits in CHRNA7 null mutant mice for P50 gating and in NRG-1 null mutants for PPI have been reported.
“Deficits in CHRNA7 null mutant mice for P50 gating (32) and in NRG-1 null mutants for PPI have also been reported (8).”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationIn schizotypal adults, deficiencies in P50 inhibition are associated with difficulties in 'hearing everything at once' and with a sense of unreality, including perceptual anomalies and magical beliefs.
“but in schizotypal adults deficiencies in P50 inhibition are associated with difficulties in “hearing everything at once” and with a sense of unreality, including perceptual anomalies and magical beliefs (20, 21).”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationHuman studies are mixed, with several but not all showing enhancement of cognition and relief of negative symptoms.
“Human studies are mixed with several but not all showing enhancement of cognition and relief of negative symptoms (39–41).”
Quote in the paperNot a substantial claim0 of 3 sources checkedMay combine two claims.
PremisecitationP50 inhibitory gating deficits in schizophrenia have been associated with the frequency and intensity of auditory hallucinations and with neurocognitive measures of decreased vigilance and attention.
“P50 inhibitory gating deficits in schizophrenia have been associated with the frequency and intensity of auditory hallucinations and with neurocognitive measures of decreased vigilance and attention, consistent with the role of inhibitory sensory gating in protecting the brain from being responsive to extraneous stimuli while it is trying to focus attention on a task (16, 17).”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationRodent models of P50 gating emphasize the hippocampus, but sources for human P50 have been found in the superior temporal gyrus and cortical rhythms are altered during the sensory gating paradigm, with a decrease in beta electroencephalographic waves.
“Rodent models of P50 gating emphasize the response in the hippocampus, but sources for human P50 have been found in the superior temporal gyrus and cortical rhythms are altered during the sensory gating paradigm, with a decrease in beta electroencephalographic waves (13).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [13] source
Not checked in the free run.
May combine two claims.
PremisecitationIncreased development of the superior longitudinal fasciculi white matter fiber tracts connecting auditory areas in the temporal lobe with the prefrontal cortex correlates with increased severity of auditory hallucinations and provides a possible anatomical correlate.
“Increased development of the superior longitudinal fasiculi white matter fiber tracts connecting the auditory areas in the temporal lobe with the prefrontal cortex also correlate with increased severity of auditory hallucinations and provide a possible anatomical correlate (50).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [50] source
Not checked in the free run.
Probably not a substantial claim: may not pass S4 (based).
Premisenone givenMagnocellular function can be assessed only through use of specially designed stimuli or tasks, such as measures of contrast sensitivity to low spatial frequency stimuli or related neurophysiological measures.
“Magnocellular function can be assessed only through use of specially designed stimuli or tasks, such as measures of contrast sensitivity to low spatial frequency stimuli or related neurophysiological measures.”
Quote in the paperNot a substantial claimMay combine two claims.
InterpretationreasoningNeither sound localization nor the cortical anatomical substrate is enhanced in schizophrenia compared to controls, but their preservation in patients with more severe hallucinations may reflect the output of a relatively intact cerebral cortex attempting to analyze an unregulated stream of sensory information resulting from earlier gating dysfunctions and specific synaptic dysfunction within thec
“Neither sound localization nor the cortical anatomical substrate are enhanced in schizophrenia, compared to controls, but their preservation in patients with more severe hallucinations compared to those without this symptom intensity may reflect the output of a relatively intact cerebral cortex that is attempting to analyze an unregulated stream of sensory information resulting from earlier gating”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationreasoningPatients experiencing dorsal stream dysfunction may be unaware of what they are missing and may not know that their subjective experience differs from that of other people.
“A consequence of such unconscious processing is that patients experiencing dorsal stream dysfunction may be unaware of what they are missing and may not know that their subjective experience differs from that of other people.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Interpretationnone givenVisual dysfunction in schizophrenia may go undetected unless specifically evaluated.
“As with auditory deficits, visual dysfunction in schizophrenia may go undetected unless specifically evaluated.”
Quote in the paperNot a substantial claimMay combine two claims.
InterpretationreasoningSchizophrenia-related dyslexia represents a regression from a higher level of function and thus may go undetected unless specifically assessed.
“However, whereas developmental dyslexia occurs during school years, permitting early detection and remediation, schizophrenia-related dyslexia represents a regression from a higher level of function and thus may go undetected unless specifically assessed.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S4 (based).
Interpretationnone givenLow level deficits may cascade up the system to produce higher order cognitive impairments.
“Nevertheless, as in the auditory system low level deficits may cascade up the system to produce higher order cognitive impairments.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.
InterpretationreasoningClinicians and families, as well as patients themselves, who are aware of these impairments may be able to compensate for them by more explicit explanations of communications, with the realization that patients may easily misperceive even the most helpful intent.
“Clinicians and families, as well as patients themselves, who are aware of these impairments may be able to compensate for them by more explicit explanations of communications, with the realization that patients may easily misperceive even the most helpful intent.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S4 (based). May combine two claims.
Interpretationnone givenClinicians must be aware that patients may be unable to detect the variations in tonality that are used to communicate information, such as emotion or even attitude (e.g. humor and sarcasm) or to process the visual information needed to correctly interpret facial expression, contributing to their difficulty in interpersonal and social interactions.
“Clinicians must be aware as well that patients may be unable to detect the variations in tonality that are used to communicate information, such as emotion or even attitude (e.g. humor and sarcasm) or to process the visual information needed to correctly interpret facial expression, contributing to their difficulty in interpersonal and social interactions.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).
Interpretationnone givenThese topics may be simpler to explore with patients than their more cognitively elaborated hallucinations and paranoid delusions.
“These topics may be simpler to explore with patients than their more cognitively elaborated hallucinations and paranoid delusions.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationThe NIMH has recently proposed the Research Domain Criterion initiative, which views neurocognitive deficits as being present dimensionally across neuropsychiatric disorders.
“The NIMH has recently proposed the Research Domain Criterion initiative (119), which views neurocognitive deficits as being present dimensionally across neuropsychiatric disorders.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [119] source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Premisenone givenResearch tools for assessing sensory dysfunction are not used in clinical practice.
“While research tools for assessing sensory dysfunction are not used in clinical practice”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningThe synaptic mechanisms and associated genes are now targets for new drug development to improve cognitive function in schizophrenia.
“The synaptic mechanisms and associated genes are now targets for new drug development to improve cognitive function in schizophrenia, one of its most limiting clinical features.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Premisenone givenBoth isolation in a quiet environment and antipsychotic drugs are used to achieve this initial therapeutic effect.
“Both isolation in a quiet environment and antipsychotic drugs are used to achieve this initial therapeutic effect.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningClinical observations of patients' sensory function have a role in treatment.
“clinical observations of patients’ sensory function also have a role in treatment.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationcitationASD patients' deficits in multisensory facilitation may lead to a fragmented experience of the environment.
“perhaps leading to a fragmented experience of the environment, (117, 118).”
Quote in the paperNot a substantial claim0 of 2 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
Premisenone givenClinicians treating acutely ill patients look for the subsidence of the hyper-vigilant state as an early therapeutic milestone.
“Clinicians treating acutely ill patients look for the subsidence of the hyper-vigilant state as an early therapeutic milestone.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable).
InterpretationreasoningSensory processing measures may make appropriate targets for intervention across, as well as within, specific nosological entities.
“and may make appropriate targets for intervention across, as well as within, specific nosological entities.”
Quote in the paperNot a substantial claimMay combine two claims.
Interpretationnone givenAssessments of sensory dysfunction, including PPI, P50 inhibitory gating, auditory MMN, and visual P1, steady state, and magnocellular responses reveal heritable neurobiological abnormalities in schizophrenia that include deficits in nicotinic cholinergic, NMDA glutamatergic, dopaminergic, and GABAergic synaptic mechanisms.
“Assessments of sensory dysfunction, including PPI, P50 inhibitory gating, auditory MMN, and visual P1, steady state, and magnocellular responses reveal heritable neurobiological abnormalities in schizophrenia that include deficits in nicotinic cholinergic, NMDA glutamatergic, dopaminergic, and GABAergic synaptic mechanisms.”
Quote in the paperNot a substantial claim
The paper relies on this without support.
Elementary sensation, such as auditory detection thresholds or visual acuity, is generally normal in patients, reflecting integrity of the peripheral sensory apparatus.
“Elementary sensation, such as auditory detection thresholds or visual acuity, is generally considered to be normal in patients, reflecting integrity of the peripheral sensory apparatus.”
The paper relies on this without support.
Schizophrenia cannot be reproduced in animals.
“Although schizophrenia cannot be re-produced in animals, mouse and rat analogues of PPI and P50 deficits can be produced.”
The citation lists haven’t been fetched yet
References 132 · Cited by 403
Research works printed but not linked: 5
- Freedman R, 1983, Biol Psychiatry, 18, 537
- Hutchison AK, J Atten Disord
- Kantrowitz JT, Psychol Med
- Franks RD, 1983, Biol Psychiatry, 18, 989
- Delay J, 1955, J Clin Exp Psychopathol, 16, 104
- Authors
- Javitt, D. C., & Freedman, R.
- Affiliations
- Nathan Kline Institute for Psychiatric Research (US)
- Venue
- American Journal of Psychiatry
- Published
- 2015-01-01
- Volume
- 172
- Issue
- 1
- Pages
- 17-31
- ISSN
- 0002-953X (ISSN-L)
- 1535-7228
- PMC
- PMC4501403
- OpenAlex
- W2123703395
- Cited by
- 403
- References
- 132
- Citations by year
- 2026: 33 · 2025: 24 · 2024: 34 · 2023: 34 · 2022: 36 · 2021: 41 · 2020: 34 · 2019: 40 · 2018: 49 · 2017: 32 · 2016: 24 · 2015: 21 · 2014: 1
- FWCI
- 3.58
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- American Journal of Psychiatry (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of Mental Health (P50MH086383, P50MH086385, R01 MH49334, R01MH049334)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
- Social Sciences › Arts and Humanities › Philosophy › Mental Health and Psychiatry
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
- Keywords
- sensory processing disorders, schizophrenia, prepulse inhibition, mismatch negativity, hallucinations, cognitive impairment, genetic susceptibility, treatment monitoring, Research Domain Criteria, sensory perception
- MeSH terms
- Acoustic Stimulation, Brain, Evoked Potentials, Auditory, Humans, Reaction Time, Schizophrenia, Reflex, Startle, Sensory Gating
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