The dorsolateral prefrontal cortex in acute and chronic pain
Open accessAbstract
The dorsolateral prefrontal cortex (DLPFC) is a functionally and structurally heterogeneous region and a key node of several brain networks, implicated in cognitive, affective, and sensory processing. As such, the DLPFC is commonly activated in experimental pain studies, and shows abnormally increased function in chronic pain populations. Furthermore, several studies have shown that some chronic pains are associated with decreased left DLPFC gray matter and that successful interventions can reverse this structural abnormality. In addition, studies have indicated that noninvasive stimulation of the left DLPFC effectively treats some chronic pains. In this article, we review the neuroimaging literature regarding the role of the DLPFC and its potential as a therapeutic target for chronic pain conditions, including studies showing the involvement of the DLPFC in encoding and modulating acute pain and studies demonstrating the reversal of DLPFC functional and structural abnormalities after successful interventions for chronic pain. We also review studies of noninvasive brain stimulation of the DLPFC showing acute pain modulation and some effectiveness as a treatment for certain chronic pain conditions. We further discuss the network architecture of the DLPFC, and postulate mechanisms by which DLPFC stimulation alleviates chronic pain. Future work testing these mechanisms will allow for more effective therapies.Perspective The structure and function of the DLPFC is abnormal in some chronic pain conditions. Upon successful resolution of pain, these abnormalities are reversed. Understanding the underlying mechanisms and the role of this region can lead to the development of an effective therapeutic target for some chronic pain conditions.
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- Premisecitation
A set of brain regions is consistently activated in response to experimental nociceptive stimulation.
“there is a set of brain regions that are consistently activated in response to experimental nociceptive stimulation25, 57”
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- Premisecitation
No single brain region or network has been shown to be specific and sufficient for nociceptive processing and pain modulation.
“there has yet to be a single brain region or network shown to be specific and sufficient for nociceptive processing and pain modulation42, 50, 83”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [42] Iannetti, 2013, Beyond metaphor: Contrasting mechanisms of social and physical pain, Trends Cogn Sci source
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- Premisecitation
The dorsolateral prefrontal cortex shows abnormally increased function in chronic pain populations.
“shows abnormally increased function in chronic pain populations”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [108] Weissman-Fogel, 2011, Abnormal cortical activity in patients with temporomandibular disorder evoked by cognitive and emotional tasks, Pain source
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- Premisecitation
Some chronic pain conditions are associated with decreased left dorsolateral prefrontal cortex gray matter compared with healthy subjects.
“some chronic pains are associated with decreased left DLPFC gray matter”
- Also stated in: § INTRODUCTION · plain
“patients with chronic back pain3, 79, 85, 92, migraine44, 77, 102, trigeminal neuropathic pain22, hypnic headache37, chronic post-traumatic headache65, hip osteoarthritis78, 79, complex regional pain syndrome26 have reduced dorsolateral prefrontal cortex (DLPFC) gray matter, compared to healthy subjects”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [3] Apkarian, 2004, Chronic back pain is associated with decreased prefrontal and thalamic gray matter density, J Neurosci source
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- Also stated in: § INTRODUCTION · plain
- Premisecitation
Non-invasive stimulation of the left dorsolateral prefrontal cortex effectively treats some chronic pain conditions.
“non-invasive stimulation of the left DLPFC effectively treats some chronic pains”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [14] Brighina, 2004, rTMS of the prefrontal cortex in the treatment of chronic migraine: A pilot study, J Neurol Sci source
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- Premisecitation
The dorsolateral prefrontal cortex is a key node of several brain networks involved in cognitive, affective, and sensory processing.
“The dorsolateral prefrontal cortex (DLPFC) is a functionally and structurally heterogeneous region and a key node of several brain networks, implicated in cognitive, affective, and sensory processing.”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [39] Hugdahl, 2015, On the existence of a generalized non-specific task-dependent network, Front Hum Neurosci source
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- Premisecitation
The dorsolateral prefrontal cortex is commonly activated in experimental pain studies.
“the DLPFC is commonly activated in experimental pain studies”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [56] Lorenz, 2003, Keeping pain out of mind: The role of the dorsolateral prefrontal cortex in pain modulation, Brain source
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- Premisecitation
Successful interventions can reverse the decreased left dorsolateral prefrontal cortex gray matter in some chronic pain conditions.
“successful interventions can reverse this structural abnormality”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [92] Seminowicz, 2011, Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function, J Neurosci source
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- cites [78] Rodriguez-Raecke, 2009, Brain gray matter decrease in chronic pain is the consequence and not the cause of pain, J Neurosci source
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- Interpretationreasoning
The dorsolateral prefrontal cortex acts as an interface between cognitive processing and pain regulation.
“In sum, these studies suggest that the DLPFC acts as an interface between cognitive processing and pain regulation.”
Quote in the paperSubstantial claim - Interpretationreasoning
The dorsolateral prefrontal cortex may be a key node of networks implicated in nociceptive processing and pain modulation.
“but may be a key node of networks implicated in nociceptive processing and pain modulation”
Quote in the paperSubstantial claim - Premisecitation
The dorsolateral prefrontal cortex has a role in cognitive components of the pain experience.
“There is converging evidence that the DLPFC has a role in cognitive components of the pain experience.”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [75] Raij, 2009, Strength of prefrontal activation predicts intensity of suggestion-induced pain, Hum Brain Mapp source
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- cites [109] Wiech, 2006, Anterolateral prefrontal cortex mediates the analgesic effect of expected and perceived control over pain, J Neurosci source
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- Interpretationcitation
Greater activation of the extrinsic mode network or less deactivation of the default mode network during task performance could be an effect of resource competition, in which cognitive processing is limited by the availability of circuits supporting those functions.
“Greater activation of EMN or less deactivation of DMN during task performance could be an effect of resource competition, in which cognitive processing is limited by the availability of circuits supporting those functions63”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [63] Norman, 1975, On data-limited and resource-limited processes, Cogn Psychol source
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- Premisecitation
Chronic pain is associated with decreased gray matter volume in many cortical and subcortical brain regions.
“While chronic pain is associated with decreased GMV in many cortical and subcortical brain regions”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Davis, 2013, Central mechanisms of pain revealed through functional and structural MRI, J Neuroimmune Pharmacol source
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- Premisecitation
The dorsolateral prefrontal cortex exhibits binary all-or-none activity in response to pain in healthy subjects, regardless of stimulus or reported pain intensities.
“the DLPFC exhibited binary (all-or-none) activity in response to pain in a sample of healthy subjects, regardless of the stimulus or reported pain intensities10”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [10] Bornhovd, 2002, Painful stimuli evoke different stimulus-response functions in the amygdala, prefrontal, insula and somatosensory cortex: A single-trial fMRI study, Brain source
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- Premisecitation
Bilateral dorsolateral prefrontal cortex activation is associated with reduced unpleasantness of thermal pain.
“Bilateral DLPFC activation was associated with reduced unpleasantness of thermal pain56”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [56] Lorenz, 2003, Keeping pain out of mind: The role of the dorsolateral prefrontal cortex in pain modulation, Brain source
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- Premisecitation
Stronger interhemispheric connectivity between left and right dorsolateral prefrontal cortex is associated with greater pain tolerance.
“stronger interhemispheric connectivity was associated with greater pain tolerance93”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [93] Sevel, 2016, Interhemispheric dorsolateral prefrontal cortex connectivity is associated with individual differences in pain sensitivity in healthy controls, Brain Connect source
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- Premisecitation
Two studies reported abnormal dorsolateral prefrontal cortex connectivity to various brain regions in chronic back pain.
“Two studies reported abnormal DLPFC connectivity to various brain regions in chronic back pain17, 36”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [17] Ceko, 2015, Partial recovery of abnormal insula and dorsolateral prefrontal connectivity to cognitive networks in chronic low back pain after treatment, Hum Brain Mapp source
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- cites [36] Hashmi, 2012, Brain networks predicting placebo analgesia in a clinical trial for chronic back pain, Pain source
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- Interpretationcitation
Spontaneous pain is related to dorsolateral prefrontal cortex activity.
“suggesting that spontaneous pain is related to DLPFC activity111”
Quote in the paperSubstantial claim - Premisecitation
Subjects instructed to suppress pain show increased activation of bilateral, particularly left, dorsolateral prefrontal cortex during prolonged acute pain stimulation.
“subjects given instructions to suppress pain show increased activation of bilateral – but particularly left – DLPFC during prolonged acute pain stimulation30”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [30] Freund, 2009, Perception and suppression of thermally induced pain: An fMRI study, Somatosens Mot Res source
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- Premisecitation
The dorsolateral prefrontal cortex is implicated in integrating incoming nociceptive signals with the expectation of pain.
“the DLPFC has been implicated in integrating incoming nociceptive signals with the expectation of pain4”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [4] Atlas, 2010, Brain mediators of predictive cue effects on perceived pain, J Neurosci source
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- Premisecitation
These structural changes are partially reversed with alleviation of pain through interventions or spontaneous resolution.
“there is growing evidence that these structural changes are partially reversed with alleviation of the pain through interventions or spontaneous resolution.”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [92] Seminowicz, 2011, Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function, J Neurosci source
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- cites [78] Rodriguez-Raecke, 2009, Brain gray matter decrease in chronic pain is the consequence and not the cause of pain, J Neurosci source
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- cites [65] Obermann, 2013, Gray matter volume reduction reflects chronic pain in trigeminal neuralgia, Neuroimage source
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- Premisecitation
The dorsolateral prefrontal cortex is involved in placebo modulation of pain.
“studies that have found the DLPFC to be involved in placebo modulation of pain70, 107”
Quote in the paperNot a substantial claim0 of 2 sources checked - Premisecitation
Aberrant dorsolateral prefrontal cortex activity can predict treatment outcomes in fibromyalgia.
“aberrant DLPFC activity can predict treatment outcomes in fibromyalgia84”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [84] Schmidt-Wilcke, 2014, Resting state connectivity correlates with drug and placebo response in fibromyalgia patients, NeuroImage Clin source
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- Premisecitation
Left dorsolateral prefrontal cortex activity is negatively related to pain unpleasantness.
“a study reported that left DLPFC activity was negatively related to pain unpleasantness (the extent to which pain bothers the subject)56”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [56] Lorenz, 2003, Keeping pain out of mind: The role of the dorsolateral prefrontal cortex in pain modulation, Brain source
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- Premisecitation
Uncontrollable pain results in increased activation of pain-related areas including the thalamus and insula.
“uncontrollable pain resulted in increased activation of pain-related areas including the thalamus and insula”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] Brascher, 2016, Different brain circuitries mediating controllable and uncontrollable pain, J Neurosci source
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- Premisecitation
Chronic low back pain patients had abnormal dorsolateral prefrontal cortex connectivity to the default mode network and extrinsic mode network.
“Patients also had abnormal DLPFC connectivity to DMN and EMN17”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [17] Ceko, 2015, Partial recovery of abnormal insula and dorsolateral prefrontal connectivity to cognitive networks in chronic low back pain after treatment, Hum Brain Mapp source
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- Premisecitation
Patients with idiopathic temporomandibular disorders have abnormally increased left dorsolateral prefrontal cortex activity during an emotional counting Stroop task.
“abnormally increased left DLPFC activity during an emotional counting Stroop task108”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [108] Weissman-Fogel, 2011, Abnormal cortical activity in patients with temporomandibular disorder evoked by cognitive and emotional tasks, Pain source
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- Premisecitation
Neuroimaging studies of experimental persistent pain and experimental models of hyperalgesia and allodynia show a parametric relationship between pain sensitization and dorsolateral prefrontal cortex activity.
“neuroimaging studies of experimental persistent pain, and experimental models of hyperalgesia and allodynia have shown a parametric relationship between pain sensitization and DLPFC activity41, 55, 87”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [41] Iadarola, 1998, Neural activation during acute capsaicin-evoked pain and allodynia assessed with PET, Brain source
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- cites [55] Lorenz, 2002, A unique representation of heat allodynia in the human brain, Neuron source
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- cites [87] Seifert, 2007, Representation of cold allodynia in the human brain–a functional MRI study, Neuroimage source
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- Premisecitation
Activation of part of this circuit, including dorsolateral prefrontal cortex, anterior cingulate cortex, and cerebellum, is implicated in mediating the analgesic effects of spinal cord stimulation in chronic back pain patients.
“activation of part of this circuit, including the DLPFC, ACC, and cerebellum, has been implicated in mediating the analgesic effects of spinal cord stimulation in chronic back pain patients59”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [59] Moens, 2012, Spinal cord stimulation modulates cerebral function: an fMRI study, Neuroradiol source
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- Premisecitation
Magnetic resonance spectroscopy studies have found decreased levels of N-acetyl-aspartate in the dorsolateral prefrontal cortex in chronic back pain and complex regional pain syndrome.
“magnetic resonance spectroscopy (MRS) studies that have found decreased levels N-acetyl-aspartate (NAA) – a putative measure of neuronal viability – in the DLPFC in chronic back pain32 and complex regional pain syndrome33”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [32] Grachev, 2000, Abnormal brain chemistry in chronic back pain: An in vivo proton magnetic resonance spectroscopy study, Pain source
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- cites [33] Grachev, 2002, Decreased levels of N-acetylaspartate in dorsolateral prefrontal cortex in a case of intractable severe sympathetically mediated chronic pain (complex regional pain syndrome, type I), Brain Cogn source
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- Premisecitation
Chronic migraine patients have reduced connectivity of bilateral dorsolateral prefrontal cortex to nodes of the default mode network.
“chronic migraine patients had reduced connectivity of bilateral DLPFC to nodes of the DMN38”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] Hubbard, 2014, Altered brain structure and function correlate with disease severity and pain catastrophizing in migraine patients, eNeuro source
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- Premisecitation
Perceived control of pain is associated with activation of the right dorsolateral prefrontal cortex.
“perceived control of pain was associated with activation of the right DLPFC109”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [109] Wiech, 2006, Anterolateral prefrontal cortex mediates the analgesic effect of expected and perceived control over pain, J Neurosci source
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- Interpretationreasoning
Targeting dorsolateral prefrontal cortex activity and connectivity could be used to design interventions for reducing pain.
“These studies suggest that targeting the DLPFC activity and connectivity could be used to design interventions for reducing pain.”
Quote in the paperSubstantial claim - Premisecitation
During controllable pain, bilateral dorsolateral prefrontal cortex has increased negative connectivity strength to the thalamus and right anterior insula.
“bilateral DLPFC had increased negative connectivity strength during controllable pain to both the thalamus and right anterior insula12”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] Brascher, 2016, Different brain circuitries mediating controllable and uncontrollable pain, J Neurosci source
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- Premisecitation
The dorsolateral prefrontal cortex acts as a switch and interface between the extrinsic mode network and default mode network.
“it is believed that the DLPFC acts as a switch and interface between the EMN and the DMN86”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [86] Seeley, 2007, Dissociable intrinsic connectivity networks for salience processing and executive control, J Neurosci source
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- Interpretationreasoning
Limited cognitive resources could affect top-down modulation requiring active control over pain.
“These limited cognitive resources could then affect top-down modulation requiring active control over pain.”
Quote in the paperSubstantial claim - Premisecitation
This dorsolateral prefrontal cortex-default mode network connectivity is negatively correlated with pain catastrophizing.
“Notably, this connectivity was negatively correlated with pain catastrophizing.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] Hubbard, 2014, Altered brain structure and function correlate with disease severity and pain catastrophizing in migraine patients, eNeuro source
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- Premisecitation
Acute experimental pain increases activity in a network modulated by cognitive load, the extrinsic mode network.
“acute experimental pain increased activity in a network modulated by cognitive load – the EMN89”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [89] Seminowicz, 2007, Pain enhances functional connectivity of a brain network evoked by performance of a cognitive task, J Neurophysiol source
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- Premisecitation
Inhibiting dorsolateral prefrontal cortex activity can block the placebo response.
“inhibiting DLPFC activity could block the placebo response47”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [47] Krummenacher, 2010, Prefrontal cortex modulates placebo analgesia, Pain source
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- Premisecitation
Patients with idiopathic temporomandibular disorders have decreased white matter connectivity from the mid-cingulate cortex to the dorsolateral prefrontal cortex compared with controls.
“patients with idiopathic temporomandibular disorders (TMD) had decreased white matter connectivity from the MCC to the DLPFC, compared to controls58”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [58] Moayedi, 2012, White matter brain and trigeminal nerve abnormalities in temporomandibular disorder, Pain source
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- Premisecitation
In some cases, structural abnormalities in the dorsolateral prefrontal cortex are correlated with pain catastrophizing or other clinical characteristics.
“In some cases, these structural abnormalities were correlated with pain catastrophizing or other clinical characteristics38”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] Hubbard, 2014, Altered brain structure and function correlate with disease severity and pain catastrophizing in migraine patients, eNeuro source
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- Premisecitation
Several studies have reported efficacy of left dorsolateral prefrontal cortex repetitive transcranial magnetic stimulation for the treatment of major depression.
“several studies have reported on the efficacy of left DLPFC rTMS for the treatment of major depression49”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [49] Lefaucheur, 2014, Evidence-based guidelines on the therapeutic use of repetitive transcranial magnetic stimulation (rTMS), Clin Neurophysiol source
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- Premisecitation
This effect of repetitive transcranial magnetic stimulation on capsaicin pain occurs via an opioid-dependent mechanism, as it is blocked by naloxone.
“this effect has been shown to occur via an opioid-dependent mechanism (i.e., it is blocked by naloxone)97”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [97] Taylor, 2012, Endogenous opioids mediate left dorsolateral prefrontal cortex rTMS-induced analgesia, Pain source
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- Premisecitation
Evidence from learning and memory studies in rodents reveals a role for neuroplasticity, either related to neurogenesis or neural reorganization.
“Evidence form learning and memory studies in rodents reveal a role for neuroplasticity – either related to neurogenesis, or neural reorganization51, 81”
Quote in the paperNot a substantial claim0 of 2 sources checked - Interpretationreasoning
Left dorsolateral prefrontal cortex repetitive transcranial magnetic stimulation for major depression might be useful for chronic pain patients via improved quality of life and increased health-promoting behaviors.
“which alone might be useful for chronic pain patients via improved quality of life and an increase health-promoting behaviors, such as increased physical exercise, social interactions, and active engagement in pain-reducing strategies.”
Quote in the paperSubstantial claim - Premisecitation
A recent study found that reductions in gray matter volume in fibromyalgia were associated with reductions in water content, not neural loss.
“A recent study found that reductions in gray matter volume in fibromyalgia were associated with reductions in water content, not neural loss72”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [72] Pomares, 2017, Histological underpinnings of grey matter changes in fibromyalgia investigated using multimodal brain imaging, J Neurosci source
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- Premisecitation
There was increased functional connectivity between the dorsolateral prefrontal cortex and the periaqueductal gray, an opioid-rich brainstem region involved in descending pain modulation.
“Notably there was increased functional connectivity between the DLPFC and the periaqueductal gray – an opioid rich brainstem region involved in descending pain modulation91”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [91] Seminowicz, 2013, Cognitive-behavioral therapy increases prefrontal cortex gray matter in patients with chronic pain, J Pain source
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- Premisecitation
Mindfulness meditation is an intervention that has been shown to regulate dorsolateral prefrontal cortex activity.
“There are other interventions that have been shown to regulate DLPFC activity, such as mindfulness meditation1.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [1] Allen, 2012, Cognitive-affective neural plasticity following active-controlled mindfulness intervention, J Neurosci source
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- Premisecitation
A study found reduced dorsolateral prefrontal cortex gray matter volume in pediatric patients with complex regional pain syndrome, amongst other brain regions, that were reversed with treatment.
“Another study found reduced DLPFC GMV in pediatric patients with complex regional pain syndrome, amongst other brain regions, that were reversed with treatment26”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [26] Erpelding, 2016, Rapid treatment-induced brain changes in pediatric CRPS, Brain Struct Funct source
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- Premisecitation
Mindfulness meditation is effective at reducing experimental heat pain.
“A recent study has shown that mindfulness meditation is effective at reducing experimental heat pain112.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [112] Zeidan, 2015, Mindfulness meditation-based pain relief employs different neural mechanisms than placebo and sham mindfulness meditation-induced analgesia, J Neurosci source
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- Interpretationreasoning
There is good evidence supporting the potential for the dorsolateral prefrontal cortex as a target for therapeutic intervention in chronic pain conditions.
“Altogether, there is good evidence supporting the potential for the DLPFC as a target for therapeutic intervention in chronic pain conditions.”
Quote in the paperSubstantial claim - Premisecitation
PET imaging studies in humans, as well as electrophysiological and immunohistochemical studies in rodent pain models, suggest a prominent role for glial cells or other immune cells.
“PET imaging studies in humans54, as well as electrophysiological and immunohistochemical studies in rodent pain models, suggest a prominent role for glial cells100 or other immune cells80”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [54] Loggia, 2015, Evidence for brain glial activation in chronic pain patients, Brain source
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- cites [100] Tsuda, 2013, Microglia and intractable chronic pain, Glia source
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- cites [80] Rosen, 2017, Sex differences in neuroimmunity and pain, J Neurosci Res source
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- Interpretationcitation
Dorsolateral prefrontal cortex structure could be a marker of successful intervention for pain conditions.
“These studies suggest that the DLPFC structure could be a marker of successful intervention for pain conditions.”
Quote in the paperSubstantial claim - Premisecitation
In healthy participants, repetitive transcranial magnetic stimulation of the left dorsolateral prefrontal cortex reduces spontaneous pain from capsaicin application.
“In healthy participants, rTMS of the left DLPFC reduces spontaneous pain from capsaicin application13”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [13] Brighina, 2011, Modulation of pain perception by transcranial magnetic stimulation of left prefrontal cortex, J Headache Pain source
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- Premisecitation
One study found an increase in left dorsolateral prefrontal cortex gray matter in chronic back pain patients six months after spinal surgery or facet joint block compared with before treatment.
“one study found an increase in left DLPFC brain gray matter in chronic back pain patients six months after spinal surgery or facet joint block compared to before treatment92”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [92] Seminowicz, 2011, Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function, J Neurosci source
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- Premisecitation
Repetitive transcranial magnetic stimulation of the left dorsolateral prefrontal cortex has shown promise as a treatment for various chronic pain disorders, including migraine and burning mouth syndrome.
“rTMS of the left DLPFC has shown promise as a treatment for various chronic pain disorders, including migraine14, 20 and burning mouth syndrome101”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [14] Brighina, 2004, rTMS of the prefrontal cortex in the treatment of chronic migraine: A pilot study, J Neurol Sci source
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- cites [20] Conforto, 2014, Randomized, proof-of-principle clinical trial of active transcranial magnetic stimulation in chronic migraine, Cephalalgia source
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- cites [101] Umezaki, 2016, The efficacy of daily prefrontal repetitive transcranial magnetic stimulation (rTMS) for burning mouth syndrome (BMS): A randomized controlled single-blind study, Brain Stimul source
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- Classified as probably not a substantial claim. 14
- May combine two claims. 29
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe dorsolateral prefrontal cortex is generally associated with maintenance and regulation of top-down modulation and with driving appropriate behavioral responses.
“it is generally associated with maintenance and regulation of top-down modulation, and driving appropriate behavioral responses64, 82”
Quote in the paperNot a substantial claim0 of 2 sources checkedClassified as probably not a substantial claim. May combine two claims.
PremisecitationThe pain experience is a construct of the central nervous system and an emergent property of network activity in the brain.
“The pain experience is a construct of the central nervous system (CNS) – an emergent property of network activity in the brain2, 23, 48”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [2] Apkarian, 2015, Pain: Acute and chronic
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- cites [23] Davis, 2013, Central mechanisms of pain revealed through functional and structural MRI, J Neuroimmune Pharmacol source
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- cites [48] Kucyi, 2015, The dynamic pain connectome, Trends Neurosci source
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Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationChronic pain is thought to be a central nervous system disorder.
“chronic pain is thought to be a CNS disorder98”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [98] Tracey, 2009, How neuroimaging studies have challenged us to rethink: Is chronic pain a disease?, J Pain source
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe dorsolateral prefrontal cortex is a functionally and structurally heterogeneous brain region.
“The DLPFC is a large and functionally heterogeneous brain region31”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [31] Glasser, 2016, A multi-modal parcellation of human cerebral cortex, Nature source
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May combine two claims.
PremisereasoningThere is some convergence across different chronic pain disorders in the pattern of gray matter abnormalities, although the pattern is not necessarily consistent across all disorders.
“Although the pattern of gray matter abnormalities is not necessarily consistent across all chronic pain disorders, there appears to be some level of convergence across different chronic pain disorders.”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationcitationSome of the brain regions consistently activated by nociceptive stimulation also show abnormal structure and function in chronic pain disorders, suggesting they may be involved in nociceptive processing and/or pain modulation.
“Some of these regions also exhibit abnormal structure and function in chronic pain disorders, suggesting that they may be implicated in nociceptive processing and/or pain modulation2, 16, 23”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [2] Apkarian, 2015, Pain: Acute and chronic
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- cites [16] Bushnell, 2013, Cognitive and emotional control of pain and its disruption in chronic pain, Nat Rev Neurosci source
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- cites [23] Davis, 2013, Central mechanisms of pain revealed through functional and structural MRI, J Neuroimmune Pharmacol source
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe dorsolateral prefrontal cortex is substantially expanded in humans compared with other primates, suggesting a role in complex cognitive processes.
“Compared to other primates, the DLPFC is substantially expanded in humans, suggesting a role in complex cognitive processes62, 73”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationThe dorsolateral prefrontal cortex shows activation in response to nociceptive stimuli in healthy subjects, or differential activation between chronic pain patients and controls.
“Specifically, it shows activation in response to nociceptive stimuli in healthy subjects, or shows differential activation between chronic pain patients and controls.”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [56] Lorenz, 2003, Keeping pain out of mind: The role of the dorsolateral prefrontal cortex in pain modulation, Brain source
Not checked in the free run.
- cites [10] Bornhovd, 2002, Painful stimuli evoke different stimulus-response functions in the amygdala, prefrontal, insula and somatosensory cortex: A single-trial fMRI study, Brain source
Not checked in the free run.
- cites [41] Iadarola, 1998, Neural activation during acute capsaicin-evoked pain and allodynia assessed with PET, Brain source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe dorsolateral prefrontal cortex is involved in cognitive processes such as attention, value encoding, working memory, creativity, decision-making, and emotional regulation.
“it has also been shown to be involved in cognitive processes18, 43, 62, 96, such as attention6, 104–106, value encoding11, 40, 46, 53, 95, working memory5, creativity52, decision-making 71, 73, and emotional regulation15, 27, 29, 67, 99”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [18] Cieslik, 2013, Is there “one” DLPFC in cognitive action control? Evidence for heterogeneity from co-activation-based parcellation, Cereb Cortex source
Not checked in the free run.
- cites [43] Jeon, 2015, Degree of automaticity and the prefrontal cortex, Trends Cogn Sci source
Not checked in the free run.
- cites [62] Nee, 2016, The hierarchical organization of the lateral prefrontal cortex, eLife source
Not checked in the free run.
May combine two claims.
PremisecitationWhen subjects perform a cognitive task while receiving a painful stimulus, there is increased activity in the ventrolateral part of the dorsolateral prefrontal cortex and deactivation of a more dorsomedial part associated with the default mode network.
“when subjects performed a cognitive task while they received a painful stimulus, there was increased activity of in the ventrolateral part of the DLPFC, and deactivation of a more dorsomedial part of DLPFC that is associated with the DMN.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [89] Seminowicz, 2007, Pain enhances functional connectivity of a brain network evoked by performance of a cognitive task, J Neurophysiol source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.
Interpretationnone givenDorsolateral prefrontal cortex connectivity can help direct patients into different health care streams and effectively allocate resources.
“Furthermore, DLPFC connectivity can help direct patients into different health care streams and effectively allocate these resources.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationThe dorsolateral prefrontal cortex is a key node of at least three brain networks: it sits between the extrinsic mode network and default mode network, and is a key node in the cognitive control network.
“the DLPFC is a key node of at least three brain networks: it sits between the interface of the extrinsic mode network (EMN)39 and default mode network (DMN)28, 74, and it is a key node in the cognitive control network19”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [39] Hugdahl, 2015, On the existence of a generalized non-specific task-dependent network, Front Hum Neurosci source
Not checked in the free run.
- cites [28] Fox, 2005, The human brain is intrinsically organized into dynamic, anticorrelated functional networks, Proc Natl Acad Sci U S A source
Not checked in the free run.
- cites [74] Raichle, 2001, A default mode of brain function, Proc Natl Acad Sci U S A source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationThe extrinsic mode network is a generalized network that allocates cognitive resources to any cognitive task or sensory processing of the external milieu.
“The EMN is thought to be a generalized network allocating cognitive resources to any cognitive task or sensory processing of the external milieu.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [39] Hugdahl, 2015, On the existence of a generalized non-specific task-dependent network, Front Hum Neurosci source
Not checked in the free run.
May combine two claims.
InterpretationreasoningThe dorsolateral prefrontal cortex suppresses insula and thalamus activity and reduces pain sensitization associated with uncontrollable pain.
“In other words, the DLPFC suppressed insula and thalamus activity and reduced pain sensitization associated with uncontrollable pain.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationThe default mode network is active in the absence of any overt stimulus or task and is related to monitoring of the internal milieu and introspection.
“The DMN, on the other hand, is active in the absence of any overt stimulus or task, and is thought to be related to monitoring of the internal milieu and introspection.”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
InterpretationreasoningNormalization of left dorsolateral prefrontal cortex function could reflect recovery of cognitive ability, potentially including cognitive coping that could help reduce pain.
“These studies suggest that normalization of the left DLPFC function could reflect recovery of cognitive ability, potentially including cognitive coping that could help reduce pain.”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationcitationThe gray matter reductions observed in the dorsolateral prefrontal cortex are feasibly related to neuronal loss, although other cellular and molecular mechanisms are not precluded.
“Therefore, it is feasible that the gray matter reductions observed are related to neuronal loss in the DLPFC, although that does not preclude other potential cellular and molecular mechanisms23, 72”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [23] Davis, 2013, Central mechanisms of pain revealed through functional and structural MRI, J Neuroimmune Pharmacol source
Not checked in the free run.
- cites [72] Pomares, 2017, Histological underpinnings of grey matter changes in fibromyalgia investigated using multimodal brain imaging, J Neurosci source
Not checked in the free run.
May combine two claims.
PremisecitationCognitive control can reduce pain and has in part been attributed to a brain network comprising prefrontal regions including dorsolateral prefrontal cortex, ventrolateral prefrontal cortex, orbitofrontal cortex, anterior insula, anterior cingulate cortex, and brainstem regions such as periaqueductal gray and rostral ventral medulla.
“Cognitive control can reduce pain and has in part been attributed to a brain network comprising prefrontal regions including DLPFC, ventrolateral prefrontal cortex (VLPFC) and orbitofrontal cortex (OFC), the anterior insula, anterior cingulate cortex (ACC), and brainstem regions, such as the periaqueductal gray (PAG) and the rostral ventral medulla7”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [7] Bingel, 2007, Imaging pain modulation in health and disease, Curr Opin Neurol source
Not checked in the free run.
May combine two claims.
PremisecitationChronic low back pain patients showed a lack of deactivation of the dorsolateral prefrontal cortex while performing a cognitive task, which resolved following effective treatment.
“Chronic low back patients showed a lack of deactivation of DLPFC while performing a cognitive task, which resolved following effective treatment92”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [92] Seminowicz, 2011, Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function, J Neurosci source
Not checked in the free run.
May combine two claims.
PremisecitationPain-related activity within bilateral dorsolateral prefrontal cortex is negatively correlated with pain catastrophizing, indicating a role in pain coping.
“pain-related activity within the bilateral DLPFC is negatively correlated with pain catastrophizing, a measure of maladaptive pain cognitions and a sense of uncontrollability, indicating a role of DLPFC in pain coping88”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [88] Seminowicz, 2006, Cortical responses to pain in healthy individuals depends on pain catastrophizing, Pain source
Not checked in the free run.
May combine two claims.
InterpretationreasoningGiven the evidence that dorsolateral prefrontal cortex structure and function reflect chronic pain states and that the dorsolateral prefrontal cortex is implicated in pain regulation, it is feasible that this brain region could serve as a therapeutic target.
“Given the compelling evidence that DLPFC structure and function reflect chronic pain states, and that the DLPFC is implicated in pain regulation, it is feasible that this brain region could potentially serve as a therapeutic target.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationTranscranial direct current stimulation of the left dorsolateral prefrontal cortex in healthy participants increases pain tolerance and improves performance on a cognitive task.
“tDCS – of the left DLPFC in healthy participants has also been shown to increase pain tolerance and improve performance on a cognitive task, consistent with the DLPFC’s role in cognitive and pain modulatory processes61”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [61] Mylius, 2012, Effects of transcranial direct current stimulation on pain perception and working memory, Eur J Pain source
Not checked in the free run.
May combine two claims.
PremisecitationOther studies reported normalized gray matter volume in right dorsolateral prefrontal cortex following total knee replacement, and normalized left dorsolateral prefrontal cortex gray matter one year after onset of post-traumatic headache, which corresponded with resolution of headache pain.
“Other studies reported normalized GMV in right DLPFC following total knee replacement78, and normalized left DLPFC GMV one year after onset of post-traumatic headache, which corresponded with a resolution of headache pain65”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [78] Rodriguez-Raecke, 2009, Brain gray matter decrease in chronic pain is the consequence and not the cause of pain, J Neurosci source
Not checked in the free run.
- cites [65] Obermann, 2013, Gray matter volume reduction reflects chronic pain in trigeminal neuralgia, Neuroimage source
Not checked in the free run.
May combine two claims.
PremisecitationThis normalization of dorsolateral prefrontal cortex gray matter correlated with a reduction in clinical pain intensity and reduced disability.
“This normalization of DLPFC gray matter correlated with a reduction in clinical pain intensity and reduced disability.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [92] Seminowicz, 2011, Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function, J Neurosci source
Not checked in the free run.
May combine two claims.
InterpretationreasoningThe lack of specificity of transcranial direct current stimulation means it stimulates large swathes of the cortex, so the same dorsolateral prefrontal cortex region may not be responsible for both pain and cognitive effects.
“Notably this does not suggest that the same region of the DLPFC is responsible for both functions, but rather the lack of specificity of tDCS – it stimulates large swathes of the cortex.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationDuring nociceptive stimulation, mindfulness meditation produced significant deactivation of the dorsolateral prefrontal cortex and an increase in ventrolateral prefrontal cortex and orbitofrontal cortex activation, compared with sham meditation and placebo pain modulation.
“This study reported a significant deactivation of the DLPFC during nociceptive stimulation and an increase in vlPFC and OFC activation, compared to sham meditation and placebo pain modulation.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [112] Zeidan, 2015, Mindfulness meditation-based pain relief employs different neural mechanisms than placebo and sham mindfulness meditation-induced analgesia, J Neurosci source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
InterpretationreasoningThe effects of dorsolateral prefrontal cortex stimulation on chronic pain could be mediated by descending modulatory opioidergic systems, or effects on cognitive or affective aspects of the pain experience, or a combination.
“These effects could be mediated by descending modulatory (opioidergic) systems, or effects on cognitive or affective aspects of the pain experience, or a combination of these mechanisms.”
Quote in the paperNot a substantial claimClassified as probably not a substantial claim.
PremisecitationSeveral studies have shown the dorsolateral prefrontal cortex to be an excellent therapeutic target for managing and treating major depressive disorder.
“several studies have shown the DLPFC to be an excellent therapeutic target for managing and treating major depressive disorder24”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [24] Downar, 2012, New targets for rTMS in depression: A review of convergent evidence, Brain Stimul source
Not checked in the free run.
May combine two claims.
InterpretationreasoningAlthough the dorsolateral prefrontal cortex has many functions and is not pain-specific, imaging and brain stimulation can be used to tap its regulatory effects to modulate and manage chronic pain.
“In sum, although the DLPFC has many functions, and is by no means pain-specific, imaging and brain stimulation can be used to tap its regulatory effects to modulate and manage chronic pain.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningIt is possible that studies reporting effective chronic pain treatment by dorsolateral prefrontal cortex stimulation could be related by treating co-morbidities, i.e., treating depression, which then alleviates pain.
“It is therefore possible that studies that have reported effective chronic pain treatment by DLPFC stimulation could be related by treating co-morbidities – i.e., these treatments could be treating depression, which then alleviates pain.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based).
InterpretationreasoningAlternatively, both depression and chronic pain may share some common neural substrates, such as the dorsolateral prefrontal cortex.
“Alternatively, both depression and chronic pain may share some common neural substrates, such as the DLPFC.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.
InterpretationreasoningChanges observed in the dorsolateral prefrontal cortex may not be directly related to pain, but may be secondary to the resolution of chronic pain.
“Another important consideration is that the changes observed in the DLPFC may not be directly related to pain, but may be secondary to the resolution of chronic pain.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationA study of effective pain management with cognitive behavioral training in a mixed chronic pain population reported increased left dorsolateral prefrontal cortex gray matter volume, which correlated with reduction in pain catastrophizing.
“Another study investigating the neural underpinnings of effective pain management with cognitive behavioral training in a mixed chronic pain population reported increased left DLPFC GMV, which correlated with reduction in pain catastrophizing91”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [91] Seminowicz, 2013, Cognitive-behavioral therapy increases prefrontal cortex gray matter in patients with chronic pain, J Pain source
Not checked in the free run.
May combine two claims.
PremisecitationThe same study found that increases in gray matter were associated with an increase of a proxy index of neurons, suggesting neural growth.
“However, the same study found that increases in gray matter were associated with an increase of a proxy index of neurons, suggesting neural growth.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [72] Pomares, 2017, Histological underpinnings of grey matter changes in fibromyalgia investigated using multimodal brain imaging, J Neurosci source
Not checked in the free run.
The paper relies on this without support.
There are few effective treatments for chronic pain.
“Despite many decades of pain research, there are few effective treatments for chronic pain.”
The paper relies on this without support.
Pain is a multidimensional experience comprising sensory, emotional, cognitive, and motivational components.
“pain is a multidimensional experience, comprised of sensory, emotional, cognitive and motivational components.”
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Ashar, Y. K., Gordon, A., Schubiner, H., Uipi, C., Knight, K., Anderson, Z., Carlisle, J., Polisky, L., Geuter, S., Flood, T. F., et al. (2022) · JAMA Psychiatry · doi:10.1001/jamapsychiatry.2021.2669 · Cited by 331 · see citing works
Zeidan, F., Baumgartner, J. N., & Coghill, R. C. (2019) · PAIN Reports · doi:10.1097/pr9.0000000000000759 · Cited by 115 · see citing works
Seminowicz, D. A., Burrowes, S. A. B., Kearson, A., Zhang, J., Krimmel, S. R., Samawi, L., Furman, A. J., Keaser, M. L., Gould, N. F., Magyari, T., et al. (2020) · Pain · doi:10.1097/j.pain.0000000000001860 · Cited by 110 · see citing works
Self-citation
- Authors
- Seminowicz, D. A., & Moayedi, M.
- Affiliations
- University of Maryland, Baltimore (US)
- University of Toronto (CA)
- Corresponding author
- Seminowicz, David A.
- Venue
- The Journal of Pain
- Publisher
- Elsevier BV
- Published
- 2017-09
- Volume
- 18
- Issue
- 9
- Pages
- 1027-1035
- ISSN
- 1526-5900 (ISSN-L)
- PMC
- PMC5581265
- OpenAlex
- W2604834320
- Cited by
- 502
- References
- 113
- Citations by year
- 2026: 55 · 2025: 84 · 2024: 69 · 2023: 56 · 2022: 68 · 2021: 66 · 2020: 45 · 2019: 42 · 2018: 15 · 2017: 2
- FWCI
- 6.28
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Pain (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of Dental and Craniofacial Research (R21DE023964)
- Topics
- Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
- Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
- Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
- Keywords
- dorsolateral prefrontal cortex, chronic pain, acute pain, pain modulation, gray matter reduction, non-invasive brain stimulation, transcranial magnetic stimulation, pain resolution, therapeutic target
- MeSH terms
- Humans, Prefrontal Cortex, Chronic Pain, Pain Management, Acute Pain, Neuroimaging
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