Cited by 94Schizophrenia research and treatmentVisual perception and processing mechanismsHallucinations in medical conditions

Consequences of Magnocellular Dysfunction on Processing Attended Information in Schizophrenia

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Martinez, A., Hillyard, S. A., Bickel, S., Dias, E. C., Butler, P. D., Javitt, D. C.·2012·Cerebral Cortex

Abstract

Schizophrenia is associated with perceptual and cognitive dysfunction including impairments in visual attention. These impairments may be related to deficits in early stages of sensory/perceptual processing, particularly within the magnocellular/dorsal visual pathway. In the present study, subjects viewed high and low spatial frequency (SF) gratings designed to test functioning of the parvocellular/magnocellular pathways, respectively. Schizophrenia patients and healthy controls attended to either the low SF (magnocellularly biased) or high SF (parvocellularly biased) gratings. Functional magnetic resonance imaging (fMRI) and recordings of event-related potentials (ERPs) were carried out during task performance. Patients were impaired at detecting low-frequency targets. ERP amplitudes to low-frequency gratings were diminished, both for the early sensory-evoked components and for the attend minus unattend difference component (the selection negativity), which is regarded as a neural index of feature-selective attention. Similarly, fMRI revealed that activity in extrastriate visual cortex was reduced in patients during attention to low, but not high, SF. In contrast, activity in frontal and parietal areas, previously implicated in the control of attention, did not differ between patients and controls. These findings suggest that impaired sensory processing of magnocellularly biased stimuli lead to impairments in the effective processing of attended stimuli, even when the attention control systems themselves are intact.

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  1. First MB, Spitzer RL, Gibbon M, Williams JBW. Structured clinical interview for DSM-IV axis I disorders—patient edition. New York: New York State Psychiatric Institute; 1997. [Google Scholar]
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Authors
Martinez, A., Hillyard, S. A., Bickel, S., Dias, E. C., Butler, P. D., & Javitt, D. C.
Affiliations
  • University of California San Diego (US)
  • Nathan Kline Institute for Psychiatric Research (US)
Venue
Cerebral Cortex
Published
2011-08-11
Volume
22
Issue
6
Pages
1282-1293
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2115450690
Cited by
94
References
60
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 2 · 2022: 5 · 2021: 4 · 2020: 13 · 2019: 3 · 2018: 7 · 2017: 6 · 2016: 4 · 2015: 11 · 2014: 9 · 2013: 14 · 2012: 7
FWCI
6.49
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (R37MH049334, P50MH086385, R24MH082790, R01MH049334)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords
schizophrenia, parvocellular pathway, visual attention, spatial frequency, event-related potentials, extrastriate cortex, dorsal visual pathway, sensory processing deficits
MeSH terms
Adult, Evoked Potentials, Visual, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Photic Stimulation, Psychomotor Performance, Schizophrenia, Visual Cortex, Visual Pathways

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