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Mazer P, Carneiro F, Domingo J, Pasion R, Silveira C, Ferreira-Santos F. Systematic review and meta-analysis of the visual mismatch negativity in schizophrenia. Eur J Neurosci 2024; 59:2863-2874. [PMID: 38739367 DOI: 10.1111/ejn.16355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 03/06/2024] [Accepted: 04/01/2024] [Indexed: 05/14/2024]
Abstract
Mismatch negativity (MMN) is an event-related potential component automatically elicited by events that violate predictions based on prior events. To elicit this component, researchers use stimulus repetition to induce predictions, and the MMN is obtained by subtracting the brain response to rare or unpredicted stimuli from that of frequent stimuli. Under the Predictive Processing framework, one increasingly popular interpretation of the mismatch response postulates that MMN represents a prediction error. In this context, the reduced MMN amplitude to auditory stimuli has been considered a potential biomarker of Schizophrenia, representing a reduced prediction error and the inability to update the mental model of the world based on the sensory signals. It is unclear, however, whether this amplitude reduction is specific for auditory events or if the visual MMN reveals a similar pattern in schizophrenia spectrum disorder. This review and meta-analysis aimed to summarise the available literature on the vMMN in schizophrenia. A systematic literature search resulted in 10 eligible studies that resulted in a combined effect size of g = -.63, CI [-.86, -.41], reflecting lower vMMN amplitudes in patients. These results are in line with the findings in the auditory domain. This component offers certain advantages, such as less susceptibility to overlap with components generated by attentional demands. Future studies should use vMMN to explore abnormalities in the Predictive Processing framework in different stages and groups of the SSD and increase the knowledge in the search for biomarkers in schizophrenia.
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Affiliation(s)
- Prune Mazer
- ESS, Polytechnic Institute of Porto, Porto, Portugal
- Laboratory of Neuropsychophysiology, Faculty of Psychology and Educational Sciences, University of Porto, Porto, Portugal
- Faculty of Medicine, University of Porto, Porto, Portugal
| | - Fábio Carneiro
- Laboratory of Neuropsychophysiology, Faculty of Psychology and Educational Sciences, University of Porto, Porto, Portugal
- Faculty of Medicine, University of Porto, Porto, Portugal
- Department of Neurology, ULS do Alto Ave, Guimarães, Portugal
| | - Juan Domingo
- Faculty of Health Sciences, Universidad Rey Juan Carlos, Madrid, Spain
| | - Rita Pasion
- Laboratory of Neuropsychophysiology, Faculty of Psychology and Educational Sciences, University of Porto, Porto, Portugal
- HEI-LAB, Lusófona University, Porto, Portugal
| | - Celeste Silveira
- Faculty of Medicine, University of Porto, Porto, Portugal
- Psychiatry Department, Hospital S. João, Porto, Portugal
| | - Fernando Ferreira-Santos
- Laboratory of Neuropsychophysiology, Faculty of Psychology and Educational Sciences, University of Porto, Porto, Portugal
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Choueiry J, Blais CM, Shah D, Smith D, Fisher D, Labelle A, Knott V. An α7 nAChR approach for the baseline-dependent modulation of deviance detection in schizophrenia: A pilot study assessing the combined effect of CDP-choline and galantamine. J Psychopharmacol 2023; 37:381-395. [PMID: 36927273 PMCID: PMC10101183 DOI: 10.1177/02698811231158903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
BACKGROUND Cognitive operations including pre-attentive sensory processing are markedly impaired in patients with schizophrenia (SCZ) but evidence significant interindividual heterogeneity, which moderates treatment response with nicotinic acetylcholine receptor (nAChR) agonists. Previous studies in healthy volunteers have shown baseline-dependency effects of the α7 nAChR agonist cytidine 5'-diphosphocholine (CDP-choline) administered alone and in combination with a nicotinic allosteric modulator (galantamine) on auditory deviance detection measured with the mismatch negativity (MMN) event-related potential (ERP). AIM The objective of this pilot study was to assess the acute effect of this combined α7 nAChR-targeted treatment (CDP-choline/galantamine) on speech MMN in patients with SCZ (N = 24) stratified by baseline MMN responses into low, medium, and high baseline auditory deviance detection subgroups. METHODS Patients with a stable diagnosis of SCZ attended two randomized, double-blind, placebo-controlled and counter-balanced testing sessions where they received a placebo or a CDP-choline (500 mg) and galantamine (16 mg) treatment. MMN ERPs were recorded during the presentation of a fast multi-feature speech MMN paradigm including five speech deviants. Clinical measures were acquired before and after treatment administration. RESULTS While no main treatment effect was observed, CDP-choline/galantamine significantly increased MMN amplitudes to frequency, duration, and vowel speech deviants in low group individuals. Individuals with higher positive and negative symptom scale negative, general, and total scores expressed the greatest MMN amplitude improvement following CDP-choline/galantamine. CONCLUSIONS These baseline-dependent nicotinic effects on early auditory information processing warrant different dosage and repeated administration assessments in patients with low baseline deviance detection levels.
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Affiliation(s)
- Joëlle Choueiry
- Department of Neuroscience, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.,University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
| | - Crystal M Blais
- Institute of Cognitive Science, Carleton University, Ottawa, ON, Canada
| | - Dhrasti Shah
- School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Dylan Smith
- University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
| | - Derek Fisher
- Department of Psychology, Faculty of Social Sciences, Mount Saint Vincent University, Halifax, NS, Canada
| | - Alain Labelle
- The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
| | - Verner Knott
- Department of Neuroscience, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.,University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada.,Institute of Cognitive Science, Carleton University, Ottawa, ON, Canada.,School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada.,The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
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3
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Choueiry J, Blais CM, Shah D, Smith D, Fisher D, Illivitsky V, Knott V. CDP-choline and galantamine, a personalized α7 nicotinic acetylcholine receptor targeted treatment for the modulation of speech MMN indexed deviance detection in healthy volunteers: a pilot study. Psychopharmacology (Berl) 2020; 237:3665-3687. [PMID: 32851421 DOI: 10.1007/s00213-020-05646-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 08/18/2020] [Indexed: 02/06/2023]
Abstract
RATIONALE The combination of CDP-choline, an α7 nicotinic acetylcholine receptor (α7 nAChR) agonist, with galantamine, a positive allosteric modulator of nAChRs, is believed to counter the fast desensitization rate of the α7 nAChRs and may be of interest for schizophrenia (SCZ) patients. Beyond the positive and negative clinical symptoms, deficits in early auditory prediction-error processes are also observed in SCZ. Regularity violations activate these mechanisms that are indexed by electroencephalography-derived mismatch negativity (MMN) event-related potentials (ERPs) in response to auditory deviance. OBJECTIVES/METHODS This pilot study in thirty-three healthy humans assessed the effects of an optimized α7 nAChR strategy combining CDP-choline (500 mg) with galantamine (16 mg) on speech-elicited MMN amplitude and latency measures. The randomized, double-blinded, placebo-controlled, and counterbalanced design with a baseline stratification method allowed for assessment of individual response differences. RESULTS Increases in MMN generation mediated by the acute CDP-choline/galantamine treatment in individuals with low baseline MMN amplitude for frequency, intensity, duration, and vowel deviants were revealed. CONCLUSIONS These results, observed primarily at temporal recording sites overlying the auditory cortex, implicate α7 nAChRs in the enhancement of speech deviance detection and warrant further examination with respect to dysfunctional auditory deviance processing in individuals with SCZ.
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Affiliation(s)
- Joelle Choueiry
- Department of Neuroscience, Faculty of Medicine, University of Ottawa, 1145 Carling Ave, Ottawa, ON, K1Z 7K4, Canada.
- Department of Psychiatry, The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada.
- Department of Psychology, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada.
| | - Crystal M Blais
- Institute of Cognitive Science, Carleton University, Ottawa, ON, Canada
| | - Dhrasti Shah
- School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Dylan Smith
- Department of Psychiatry, The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
- Department of Psychology, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
- School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Derek Fisher
- Department of Psychology, Faculty of Social Sciences, Mount Saint Vincent University, Halifax, NS, Canada
| | - Vadim Illivitsky
- Department of Psychiatry, The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
| | - Verner Knott
- Department of Neuroscience, Faculty of Medicine, University of Ottawa, 1145 Carling Ave, Ottawa, ON, K1Z 7K4, Canada
- Department of Psychiatry, The Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
- Department of Psychology, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
- Institute of Cognitive Science, Carleton University, Ottawa, ON, Canada
- School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada
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Abstract
It is now well documented that schizophrenia is associated with impairments in visual processing at all levels of vision, and that these disturbances are related to deficits in multiple higher-level cognitive and social cognitive functions. Visual remediation methods have been slow to appear in the literature as a potential treatment strategy to target these impairments, however, in contrast to interventions that aim to improve auditory and higher cognitive functions in schizophrenia. In this report, we describe a National Institute of Mental Health (NIMH)-funded R61/R33 grant that uses a phased approach to optimize and evaluate a novel visual remediation intervention for people with schizophrenia. The goals of this project are: (1) in the R61 phase, to establish the optimal components and dose (number of sessions) of a visual remediation intervention from among two specific visual training strategies (and their combination) for improving low and mid-level visual functions in schizophrenia; and (2) in the R33 phase, to determine the extent to which the optimal intervention improves not only visual processing but also higher-level cognitive and role functions. Here we present the scientific background for and innovation of the study, along with our methods, hypotheses, and preliminary data. The results of this study will help determine the utility of this novel intervention approach for targeting visual perceptual, cognitive, and functional impairments in schizophrenia.
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Kovács G, Grotheer M, Münke L, Kéri S, Nenadić I. Significant repetition probability effects in schizophrenia. Psychiatry Res Neuroimaging 2019; 290:22-29. [PMID: 31254800 DOI: 10.1016/j.pscychresns.2019.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND A growing body of evidence suggests that the comparison of expected and incoming sensory stimuli (the prediction-error (ε) processing) is impaired in schizophrenia patients (SZ). For example, in studies of mismatch negativity, an ERP component that signals ε, SZ patients show deficits in the auditory and visual modalities. To test the role of impaired ε processing further in SZ, using neuroimaging methods, we applied a repetition-suppression (RS) paradigm. METHODS Patients diagnosed with SZ (n = 17) as well as age- and sex- matched healthy control subjects (HC, n = 17) were presented with pairs of faces, which could either repeat or alternate. Additionally, the likelihood of repetition/alternation trials was modulated in individual blocks of fMRI recordings, testing the effects of repetition probability (P(rep)) on RS. RESULTS We found a significant RS in the fusiform and occipital face areas as well as in the lateral occipital cortex that was similar in healthy controls and SZ patients SZ. More importantly, we observed similar P(rep) effects (larger RS in blocks with high frequency of repetitions than in blocks with low repetition likelihood) in both the control and the patient group. CONCLUSION Our findings suggest that repetition_probability modulations affect the neural responses in schizophrenia patients and healthy participants similarly. This suggests that the neural mechanisms determining perceptual inferences based on stimulus probabilities remain unimpaired in schizophrenia.
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Affiliation(s)
- Gyula Kovács
- Institute of Psychology, Friedrich Schiller University Jena, 07743 Jena, Germany; DFG Research Unit Person Perception, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Mareike Grotheer
- Institute of Psychology, Friedrich Schiller University Jena, 07743 Jena, Germany; DFG Research Unit Person Perception, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Lisa Münke
- Department of Psychiatry and Psychotherapy, Jena University Hospital, 07743 Jena, Germany
| | - Szabolcs Kéri
- Department of Cognitive Science, Budapest University of Technology and Economics, 1111 Budapest, Hungary
| | - Igor Nenadić
- Department of Psychiatry and Psychotherapy, Jena University Hospital, 07743 Jena, Germany; Department of Psychiatry and Psychotherapy, Philipps-Universität Marburg / Marburg University Hospital - UKGM, Rudolf-Bultmann-Str. 8, 35037 Marburg, Germany.
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Vogel BO, Stasch J, Walter H, Neuhaus AH. Emotional context restores cortical prediction error responses in schizophrenia. Schizophr Res 2018; 197:434-440. [PMID: 29501387 DOI: 10.1016/j.schres.2018.02.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 02/12/2018] [Accepted: 02/18/2018] [Indexed: 11/19/2022]
Abstract
The mismatch negativity (MMN) deficit in schizophrenia is a consistently replicated finding and is considered a potential biomarker. From the cognitive neuroscience perspective, MMN represents a cortical correlate of the prediction error, a fundamental computational operator that may be at the core of various cognitive and clinical deficits observed in schizophrenia. The impact of emotion on cognitive processes in schizophrenia is insufficiently understood, and its impact on basic operators of cortical computation is largely unknown. In the visual domain, the facial expression mismatch negativity (EMMN) offers an opportunity to investigate basic computational operators in purely cognitive and in emotional contexts. In this study, we asked whether emotional context enhances cortical prediction error responses in patients with schizophrenia, as is the case in normal subjects. Therefore, seventeen patients with schizophrenia and eighteen controls completed a visual sequence oddball task, which allows for directly comparing MMN components evoked by deviants with high, intermediate and low emotional engagement. Interestingly, patients with schizophrenia showed pronounced deficits in response to neutral stimuli, but almost normal responses to emotional stimuli. The dissociation between impaired MMN and normal EMMN suggests that emotional context not only enhances, but restores cortical prediction error responses in patients with schizophrenia to near-normal levels. Our results show that emotional processing in schizophrenia is not necessarily defect; more likely, emotional processing heterogeneously impacts on cognition in schizophrenia. In fact, this study suggests that emotional context may even compensate for cognitive deficits in schizophrenia that are, in a different sensory domain, discussed as biomarkers.
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Affiliation(s)
- Bob O Vogel
- Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany; Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Charité Mitte, Charitéplatz 1, 10117 Berlin, Germany.
| | - Joanna Stasch
- Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany; Department of Forensic Psychiatry, Charité Universitätsmedizin Berlin, Oranienburger Straße 285, 13437 Berlin, Germany.
| | - Henrik Walter
- Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Charité Mitte, Charitéplatz 1, 10117 Berlin, Germany.
| | - Andres H Neuhaus
- Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany; Department of Psychiatry, Charité Universitätsmedizin Berlin, Campus Charité Mitte, Charitéplatz 1, 10117 Berlin, Germany; Department of Psychiatry, District Hospital Prignitz, Dobberziner Straße 112, 19348 Perleberg, Germany; Medical School Brandenburg Theodor Fontane, Fehrbelliner Str. 38, 16816 Neuruppin, Germany.
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7
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Grove TB, Yao B, Mueller SA, McLaughlin M, Ellingrod VL, McInnis MG, Taylor SF, Deldin PJ, Tso IF. A Bayesian model comparison approach to test the specificity of visual integration impairment in schizophrenia or psychosis. Psychiatry Res 2018; 265:271-278. [PMID: 29768190 PMCID: PMC6448399 DOI: 10.1016/j.psychres.2018.04.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 02/23/2018] [Accepted: 04/22/2018] [Indexed: 10/17/2022]
Abstract
Impaired visual integration is well documented in schizophrenia and related to functional outcomes. However, it is unclear if this deficit is specific to schizophrenia, or characteristic of psychosis more broadly. To address this question, this study used a Bayesian model comparison approach to examine the evidence of three grouping models of visual integration performance in 116 individuals with schizophrenia (SZ), schizoaffective disorder (SA), bipolar disorder (BD) with or without a history of prominent psychosis (BDP+ and BDP-, respectively), or no psychiatric diagnosis (healthy controls; HC). We compared: (1) Psychosis Model (psychosis, non-psychosis), where the psychosis group included SZ, SA, and BDP+, and the non-psychosis group included BDP- and HC; (2) Schizophrenia Model (SZ, non-SZ); and (3) DSM Model (SZ, SA, BD, HC). The relationship between visual integration and general cognition was also explored. The Psychosis Model showed the strongest evidence, and visual integration was associated with general cognition in participants with psychosis. The results were consistent with the Research Domain Criteria (RDoC) framework, indicating that visual integration impairment is characteristic of psychosis and not specific to SZ or DSM categories, and may share similar disease pathways with observed neurocognitive deficits in psychotic disorders.
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Affiliation(s)
- Tyler B. Grove
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA,Correspondence concerning this article should be addressed to Tyler Grove, Department of Psychology, University of Michigan, 530 Church Street, Ann Arbor, Michigan 48109, USA. . Tel: 1-(734)-647-3872
| | - Beier Yao
- Department of Psychology, Michigan State University, East Lansing, Michigan, USA
| | - Savanna A. Mueller
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Vicki L. Ellingrod
- Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA,College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Melvin G. McInnis
- Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA
| | - Stephan F. Taylor
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA,Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA
| | - Patricia J. Deldin
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA,Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA
| | - Ivy F. Tso
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA,Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA
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Tanaka K, Tanaka M, Kajiwara T, Wang HO. A Practical SSVEP-Based Algorithm for Perceptual Dominance Estimation in Binocular Rivalry. IEEE Trans Cogn Dev Syst 2018. [DOI: 10.1109/tcds.2017.2679224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Graham AM, Rasmussen JM, Rudolph MD, Heim CM, Gilmore JH, Styner M, Potkin SG, Entringer S, Wadhwa PD, Fair DA, Buss C. Maternal Systemic Interleukin-6 During Pregnancy Is Associated With Newborn Amygdala Phenotypes and Subsequent Behavior at 2 Years of Age. Biol Psychiatry 2018; 83:109-119. [PMID: 28754515 PMCID: PMC5723539 DOI: 10.1016/j.biopsych.2017.05.027] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/09/2017] [Accepted: 05/17/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Maternal inflammation during pregnancy increases the risk for offspring psychiatric disorders and other adverse long-term health outcomes. The influence of inflammation on the developing fetal brain is hypothesized as one potential mechanism but has not been examined in humans. METHODS Participants were adult women (N = 86) who were recruited during early pregnancy and whose offspring were born after 34 weeks' gestation. A biological indicator of maternal inflammation (interleukin-6) that has been shown to influence fetal brain development in animal models was quantified serially in early, mid-, and late pregnancy. Structural and functional brain magnetic resonance imaging scans were acquired in neonates shortly after birth. Infants' amygdalae were individually segmented for measures of volume and as seeds for resting state functional connectivity. At 24 months of age, children completed a snack delay task to assess impulse control. RESULTS Higher average maternal interleukin-6 concentration during pregnancy was prospectively associated with larger right amygdala volume and stronger bilateral amygdala connectivity to brain regions involved in sensory processing and integration (fusiform, somatosensory cortex, and thalamus), salience detection (anterior insula), and learning and memory (caudate and parahippocampal gyrus). Larger newborn right amygdala volume and stronger left amygdala connectivity were in turn associated with lower impulse control at 24 months of age, and mediated the association between higher maternal interleukin-6 concentrations and lower impulse control. CONCLUSIONS These findings provide new evidence in humans linking maternal inflammation during pregnancy with newborn brain and emerging behavioral phenotypes relevant for psychiatric disorders. A better understanding of intrauterine conditions that influence offspring disease susceptibility is warranted to inform targeted early intervention and prevention efforts.
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Affiliation(s)
- Alice M Graham
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - Jerod M Rasmussen
- Development, Health and Disease Research Program, University of California, Irvine, Irvine, California
| | - Marc D Rudolph
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - Christine M Heim
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Medical Psychology, Berlin, Germany; Department of Biobehavioral Health, Pennsylvania State University, University Park, Pennsylvania
| | - John H Gilmore
- Department of Psychiatry, University of North Carolina, Chapel Hill, North Carolina
| | - Martin Styner
- Department of Psychiatry, University of North Carolina, Chapel Hill, North Carolina
| | - Steven G Potkin
- Department of Psychiatry and Human Behavior, University of California, Irvine, Irvine, California
| | - Sonja Entringer
- Development, Health and Disease Research Program, University of California, Irvine, Irvine, California; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Medical Psychology, Berlin, Germany
| | - Pathik D Wadhwa
- Development, Health and Disease Research Program, University of California, Irvine, Irvine, California
| | - Damien A Fair
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon; Advanced Imaging Research Center, Oregon Health & Science University, Portland, Oregon
| | - Claudia Buss
- Development, Health and Disease Research Program, University of California, Irvine, Irvine, California; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Medical Psychology, Berlin, Germany.
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10
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Joshi YB, Light GA. Using EEG-Guided Basket and Umbrella Trials in Psychiatry: A Precision Medicine Approach for Cognitive Impairment in Schizophrenia. Front Psychiatry 2018; 9:554. [PMID: 30510520 PMCID: PMC6252381 DOI: 10.3389/fpsyt.2018.00554] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/15/2018] [Indexed: 12/21/2022] Open
Abstract
Due to advances over the last several decades, many fields of medicine are moving toward a precision medicine approach where treatments are tailored to nuanced patient factors. While in some disciplines these innovations are commonplace leading to unique biomarker-guided experimental medicine trials, there are no such analogs in psychiatry. In this brief review, we will overview two unique biomarker-guided trial designs for future use in psychiatry: basket and umbrella trials. We will illustrate how such trials could be useful in psychiatry using schizophrenia as a candidate illness, the EEG measure mismatch negativity as the candidate biomarker, and cognitive impairment as the target disease dimension.
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Affiliation(s)
- Yash B Joshi
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, United States
| | - Gregory A Light
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, United States.,VISN-22 Mental Illness, Research, Education and Clinical Center (MIRECC), VA San Diego Health Care System, San Diego, CA, United States
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11
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Effects of transcranial direct current stimulation on the auditory mismatch negativity response and working memory performance in schizophrenia: a pilot study. J Neural Transm (Vienna) 2017; 124:1489-1501. [PMID: 28864916 DOI: 10.1007/s00702-017-1783-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/21/2017] [Indexed: 01/06/2023]
Abstract
Cognitive impairment has been proposed to be the core feature of schizophrenia (Sz). Transcranial direct current stimulation (tDCS) is a non-invasive form of brain stimulation which can improve cognitive function in healthy participants and in psychiatric patients with cognitive deficits. tDCS has been shown to improve cognition and hallucination symptoms in Sz, a disorder also associated with marked sensory processing deficits. Recent findings in healthy controls demonstrate that anodal tDCS increases auditory deviance detection, as measured by the brain-based event-related potential, mismatch negativity (MMN), which is a putative biomarker of Sz that has been proposed as a target for treatment of Sz cognition. This pilot study conducted a randomized, double-blind assessment of the effects of pre- and post-tDCS on MMN-indexed auditory discrimination in 12 Sz patients, moderated by auditory hallucination (AH) presence, as well as working memory performance. Assessments were conducted in three sessions involving temporal and frontal lobe anodal stimulation (to transiently excite local brain activity), and one control session involving 'sham' stimulation (meaning with the device turned off, i.e., no stimulation). Results demonstrated a trend for pitch MMN amplitude to increase with anodal temporal tDCS, which was significant in a subgroup of Sz individuals with AHs. Anodal frontal tDCS significantly increased WM performance on the 2-back task, which was found to positively correlate with MMN-tDCS effects. The findings contribute to our understanding of tDCS effects for sensory processing deficits and working memory performance in Sz and may have implications for psychiatric disorders with sensory deficits.
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12
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Impey D, de la Salle S, Baddeley A, Knott V. Effects of an NMDA antagonist on the auditory mismatch negativity response to transcranial direct current stimulation. J Psychopharmacol 2017; 31:614-624. [PMID: 27624152 DOI: 10.1177/0269881116665336] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Transcranial direct current stimulation (tDCS) is a non-invasive form of brain stimulation which uses a weak constant current to alter cortical excitability and activity temporarily. tDCS-induced increases in neuronal excitability and performance improvements have been observed following anodal stimulation of brain regions associated with visual and motor functions, but relatively little research has been conducted with respect to auditory processing. Recently, pilot study results indicate that anodal tDCS can increase auditory deviance detection, whereas cathodal tDCS decreases auditory processing, as measured by a brain-based event-related potential (ERP), mismatch negativity (MMN). As evidence has shown that tDCS lasting effects may be dependent on N-methyl-D-aspartate (NMDA) receptor activity, the current study investigated the use of dextromethorphan (DMO), an NMDA antagonist, to assess possible modulation of tDCS's effects on both MMN and working memory performance. The study, conducted in 12 healthy volunteers, involved four laboratory test sessions within a randomised, placebo and sham-controlled crossover design that compared pre- and post-anodal tDCS over the auditory cortex (2 mA for 20 minutes to excite cortical activity temporarily and locally) and sham stimulation (i.e. device is turned off) during both DMO (50 mL) and placebo administration. Anodal tDCS increased MMN amplitudes with placebo administration. Significant increases were not seen with sham stimulation or with anodal stimulation during DMO administration. With sham stimulation (i.e. no stimulation), DMO decreased MMN amplitudes. Findings from this study contribute to the understanding of underlying neurobiological mechanisms mediating tDCS sensory and memory improvements.
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Affiliation(s)
- Danielle Impey
- 1 Clinical Neuroelectrophysiology and Cognitive Research Laboratory, University of Ottawa Institute of Mental Health Research, Ottawa, Canada.,2 School of Psychology, University of Ottawa, Ottawa, Canada
| | - Sara de la Salle
- 1 Clinical Neuroelectrophysiology and Cognitive Research Laboratory, University of Ottawa Institute of Mental Health Research, Ottawa, Canada.,2 School of Psychology, University of Ottawa, Ottawa, Canada
| | - Ashley Baddeley
- 1 Clinical Neuroelectrophysiology and Cognitive Research Laboratory, University of Ottawa Institute of Mental Health Research, Ottawa, Canada
| | - Verner Knott
- 1 Clinical Neuroelectrophysiology and Cognitive Research Laboratory, University of Ottawa Institute of Mental Health Research, Ottawa, Canada.,2 School of Psychology, University of Ottawa, Ottawa, Canada
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Li Z, Lei W, Deng W, Zheng Z, Li M, Ma X, Wang Q, Huang C, Li N, Collier DA, Gong Q, Li T. Aberrant spontaneous neural activity and correlation with evoked-brain potentials in first-episode, treatment-naïve patients with deficit and non-deficit schizophrenia. Psychiatry Res Neuroimaging 2017; 261:9-19. [PMID: 28092779 DOI: 10.1016/j.pscychresns.2017.01.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 12/03/2016] [Accepted: 01/02/2017] [Indexed: 02/05/2023]
Abstract
The goals of the study were to analyze spontaneous neural activity between deficit and non-deficit schizophrenia (DS, NDS) using resting-state fMRI, and to investigate the correlation of fMRI with clinical features and evoked brain potentials. The amplitude of low frequency fluctuation (ALFF) was measured in 41 DS participants, 42 NDS participants, and 42 healthy controls. ALFF in the bilateral cerebellum posterior lobe was significantly decreased in patients, while ALFF in the right fusiform gyrus and the bilateral putamen was significantly increased. In schizophrenia patients, ALFF in the right putamen positively correlated with excited/activation on Positive and Negative Syndrome Scale (PANSS-EXC/ACT). In DS patients, ALFF in the right insula was significantly increased than in controls and positively correlated with S2-P50 amplitude of sensory gating P50. ALFF in the left cerebellum posterior lobe negatively correlated with negative symptoms and withdrawn on PANSS (PANSS-NS, PANSS-WIT), ALFF in the right putamen positively correlated with PANSS-WIT. In NDS patients, ALFF in the middle temporal gyrus decreased than in controls and negatively correlated with P3b subcomponent of P300 latency. ALFF in the left cerebellum posterior lobe negatively correlated with PANSS-EXC/ACT. The middle temporal gyrus in NDS or the right insula in DS may show spatiotemporal defects.
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Affiliation(s)
- Zhe Li
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wei Lei
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; The Psychiatry Department, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Wei Deng
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhong Zheng
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; The Neurobiological Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Mingli Li
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xiaohong Ma
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Qiang Wang
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chaohua Huang
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; The Psychiatry Department, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Na Li
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - David A Collier
- Discovery Neuroscience Research, Eli Lilly and Company Ltd., Lilly Research Laboratories, Erl Wood Manor, Windlesham, Surrey, United Kingdom
| | - Qiyong Gong
- MRI Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tao Li
- The Mental Health Center and the Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
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14
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Using model systems to understand errant plasticity mechanisms in psychiatric disorders. Nat Neurosci 2016; 19:1418-1425. [PMID: 27786180 DOI: 10.1038/nn.4413] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 09/13/2016] [Indexed: 02/08/2023]
Abstract
In vivo model systems are a critical tool for gaining insight into the pathology underlying psychiatric disorders. Although modern functional imaging tools allow study of brain correlates of behavior in clinical groups and genome-wide association studies are beginning to uncover the complex genetic architecture of psychiatric disorders, there is less understanding of pathology at intervening levels of organization. Several psychiatric disorders derive from pathological neural plasticity, and studying the mechanisms that underlie these processes, including reinforcement learning and spike-timing-dependent plasticity, requires the use of animals. It will be particularly important to understand how individual differences in plasticity mechanisms at a cellular level confer resilience on some but lead to disease in others.
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15
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Impey D, de la Salle S, Knott V. Assessment of anodal and cathodal transcranial direct current stimulation (tDCS) on MMN-indexed auditory sensory processing. Brain Cogn 2016; 105:46-54. [DOI: 10.1016/j.bandc.2016.03.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 03/04/2016] [Accepted: 03/23/2016] [Indexed: 12/20/2022]
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16
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Thibaut F, Boutros NN, Jarema M, Oranje B, Hasan A, Daskalakis ZJ, Wichniak A, Schmitt A, Riederer P, Falkai P. Consensus paper of the WFSBP Task Force on Biological Markers: Criteria for biomarkers and endophenotypes of schizophrenia part I: Neurophysiology. World J Biol Psychiatry 2016. [PMID: 26213111 DOI: 10.3109/15622975.2015.1050061] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The neurophysiological components that have been proposed as biomarkers or as endophenotypes for schizophrenia can be measured through electroencephalography (EEG) and magnetoencephalography (MEG), transcranial magnetic stimulation (TMS), polysomnography (PSG), registration of event-related potentials (ERPs), assessment of smooth pursuit eye movements (SPEM) and antisaccade paradigms. Most of them demonstrate deficits in schizophrenia, show at least moderate stability over time and do not depend on clinical status, which means that they fulfil the criteria as valid endophenotypes for genetic studies. Deficits in cortical inhibition and plasticity measured using non-invasive brain stimulation techniques seem promising markers of outcome and prognosis. However the utility of these markers as biomarkers for predicting conversion to psychosis, response to treatments, or for tracking disease progression needs to be further studied.
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Affiliation(s)
- Florence Thibaut
- Department of Psychiatry, University Hospital Cochin (site Tarnier), University of Paris-Descartes, INSERM U 894 Centre Psychiatry and Neurosciences , Paris , France
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Atypical visual and somatosensory adaptation in schizophrenia-spectrum disorders. Transl Psychiatry 2016; 6:e804. [PMID: 27163205 PMCID: PMC5070065 DOI: 10.1038/tp.2016.63] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 01/11/2016] [Accepted: 03/05/2016] [Indexed: 12/12/2022] Open
Abstract
Neurophysiological investigations in patients with schizophrenia consistently show early sensory processing deficits in the visual system. Importantly, comparable sensory deficits have also been established in healthy first-degree biological relatives of patients with schizophrenia and in first-episode drug-naive patients. The clear implication is that these measures are endophenotypic, related to the underlying genetic liability for schizophrenia. However, there is significant overlap between patient response distributions and those of healthy individuals without affected first-degree relatives. Here we sought to develop more sensitive measures of sensory dysfunction in this population, with an eye to establishing endophenotypic markers with better predictive capabilities. We used a sensory adaptation paradigm in which electrophysiological responses to basic visual and somatosensory stimuli presented at different rates (ranging from 250 to 2550 ms interstimulus intervals, in blocked presentations) were compared. Our main hypothesis was that adaptation would be substantially diminished in schizophrenia, and that this would be especially prevalent in the visual system. High-density event-related potential recordings showed amplitude reductions in sensory adaptation in patients with schizophrenia (N=15 Experiment 1, N=12 Experiment 2) compared with age-matched healthy controls (N=15 Experiment 1, N=12 Experiment 2), and this was seen for both sensory modalities. At the individual participant level, reduced adaptation was more robust for visual compared with somatosensory stimulation. These results point to significant impairments in short-term sensory plasticity across sensory modalities in schizophrenia. These simple-to-execute measures may prove valuable as candidate endophenotypes and will bear follow-up in future work.
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Maher S, Ekstrom T, Holt D, Ongur D, Chen Y. The Core Brain Region for Face Processing in Schizophrenia Lacks Face Selectivity. Schizophr Bull 2016; 42:666-74. [PMID: 26453911 PMCID: PMC4838078 DOI: 10.1093/schbul/sbv140] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Face perception impairment in schizophrenia has long been recognized. However, brain mechanisms underlying this socially important perceptual deficit are not well understood. Previous magnetic resonance imaging (MRI) studies have shown that patients have altered structure in brain regions responsible for processing face information, but functional properties of these brain regions are not clearly determined. A key functional property of the face-processing system--face selectivity--has yet to be evaluated in schizophrenia. METHODS We used functional MRI (fMRI) to examine face selectivity of 3 core face-processing regions--fusiform face area (FFA), occipital face area (OFA), and superior temporal sulcus (STS)--in schizophrenia patients (n = 24) and healthy controls (n = 23). To disassociate face-specific processing from general perceptual processing, we compared cortical activations during performance of perceptually equated face and tree detection tasks. RESULTS Activation levels of the 3 putative face-processing regions during face detection did not differ between patients and controls, being similar for FFA and OFA and absent for STS. However, face selectivity, indexed by the difference in cortical activation between face and tree detection, was significantly reduced in patients for FFA, especially for low-contrast stimuli. FFA activation and perceptual performance during face detection were associated in patients. CONCLUSIONS These results show a lack of face-specific processing in the schizophrenic brain region presumably subserving face perception. This finding suggests boosting visual salience of face images as a potential therapeutic venue for improving face perception in this psychiatric disorder.
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Affiliation(s)
- Stephen Maher
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA
| | - Tor Ekstrom
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA
| | - Daphne Holt
- Massachusetts General Hospital, Department of Psychiatry, Harvard Medical School, Boston, MA
| | - Dost Ongur
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA
| | - Yue Chen
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Belmont, MA;
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Kärgel C, Sartory G, Kariofillis D, Wiltfang J, Müller BW. The effect of auditory and visual training on the mismatch negativity in schizophrenia. Int J Psychophysiol 2016; 102:47-54. [DOI: 10.1016/j.ijpsycho.2016.03.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 03/04/2016] [Accepted: 03/07/2016] [Indexed: 10/22/2022]
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20
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Horacek M, Kärgel C, Scherbaum N, Müller BW. The effect of deviance predictability on mismatch negativity in schizophrenia patients. Neurosci Lett 2016; 617:76-81. [PMID: 26861199 DOI: 10.1016/j.neulet.2016.02.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 01/28/2016] [Accepted: 02/04/2016] [Indexed: 11/18/2022]
Abstract
Mismatch negativity (MMN) is an electrophysiological index of prediction error processing and recently has been considered an endophenotype marker in schizophrenia. While the prediction error is a core concept in the MMN generation, predictability of deviance occurrence has rarely been assessed in MMN research and in schizophrenia patients. We investigated the MMN to 12% temporally predictable or unpredictable duration decrement deviant stimuli in two runs in 29 healthy controls and 31 schizophrenia patients. We analyzed MMN amplitudes and latencies and its associations with clinical symptoms at electrode Fz. With a stimulus onset asynchronicity of 500 ms in the regular predictable condition, a deviant occurred every 4s while it varied randomly in the unpredictable condition. In the random condition we found diminished MMN amplitudes in patients which normalized in the regular deviance condition, resulting in an analysis of variance main effect of predictability and a predictability x group interaction. Deviance predictability did not affect the MMN of control subjects and we found no relevant results with regard to MMN latencies. Our results indicate that MMN amplitudes in patients normalize to the level of the control subjects in the case of a temporally fixed regular deviant. In schizophrenia patients the detection of deviance is basically intact. However, the temporal uncertainty of deviance occurrence may be of substantial relevance to the highly replicated MMN deficit in schizophrenia patients.
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Affiliation(s)
- Magdalena Horacek
- Department of Psychiatry and Psychotherapy, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Virchowstrasse 174, 45147 Essen, Germany; Department of Psychology, University of Wuppertal, Gaußstrasse 2 0, 42119 Wuppertal, Germany
| | - Christian Kärgel
- Department of Psychiatry and Psychotherapy, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Virchowstrasse 174, 45147 Essen, Germany
| | - Norbert Scherbaum
- Department of Psychiatry and Psychotherapy, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Virchowstrasse 174, 45147 Essen, Germany; Department of Addiction Medicine and Addictive Behavior, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Virchowstrasse 174, 45147 Essen, Germany
| | - Bernhard W Müller
- Department of Psychiatry and Psychotherapy, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Virchowstrasse 174, 45147 Essen, Germany; Department of Psychology, University of Wuppertal, Gaußstrasse 2 0, 42119 Wuppertal, Germany.
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21
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Maher S, Mashhoon Y, Ekstrom T, Lukas S, Chen Y. Deficient cortical face-sensitive N170 responses and basic visual processing in schizophrenia. Schizophr Res 2016; 170:87-94. [PMID: 26690888 PMCID: PMC4707115 DOI: 10.1016/j.schres.2015.12.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/05/2015] [Accepted: 12/08/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Face detection, an ability to identify a visual stimulus as a face, is impaired in patients with schizophrenia. It is unclear whether impaired face processing in this psychiatric disorder results from face-specific domains or stems from more basic visual domains. In this study, we examined cortical face-sensitive N170 response in schizophrenia, taking into account deficient basic visual contrast processing. METHODS We equalized visual contrast signals among patients (n=20) and controls (n=20) and between face and tree images, based on their individual perceptual capacities (determined using psychophysical methods). We measured N170, a putative temporal marker of face processing, during face detection and tree detection. RESULTS In controls, N170 amplitudes were significantly greater for faces than trees across all three visual contrast levels tested (perceptual threshold, two times perceptual threshold and 100%). In patients, however, N170 amplitudes did not differ between faces and trees, indicating diminished face selectivity (indexed by the differential responses to face vs. tree). CONCLUSION These results indicate a lack of face-selectivity in temporal responses of brain machinery putatively responsible for face processing in schizophrenia. This neuroimaging finding suggests that face-specific processing is compromised in this psychiatric disorder.
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Affiliation(s)
| | | | | | | | - Y Chen
- McLean Hospital, Harvard Medical School, United States.
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22
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Silverstein SM. Visual Perception Disturbances in Schizophrenia: A Unified Model. NEBRASKA SYMPOSIUM ON MOTIVATION. NEBRASKA SYMPOSIUM ON MOTIVATION 2016; 63:77-132. [PMID: 27627825 DOI: 10.1007/978-3-319-30596-7_4] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Goldstein MR, Peterson MJ, Sanguinetti JL, Tononi G, Ferrarelli F. Topographic deficits in alpha-range resting EEG activity and steady state visual evoked responses in schizophrenia. Schizophr Res 2015; 168:145-52. [PMID: 26159669 DOI: 10.1016/j.schres.2015.06.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 06/10/2015] [Accepted: 06/12/2015] [Indexed: 01/16/2023]
Abstract
Deficits in both resting alpha-range (8-12Hz) electroencephalogram (EEG) activity and steady state evoked potential (SSVEP) responses have been reported in schizophrenia. However, the topographic specificity of these effects, the relationship between resting EEG and SSVEP, as well as the impact of antipsychotic medication on these effects, have not been clearly delineated. The present study sought to address these questions with 256 channel high-density EEG recordings in a group of 13 schizophrenia patients, 13 healthy controls, and 10 non-schizophrenia patients with psychiatric diagnoses currently taking antipsychotic medication. At rest, the schizophrenia group demonstrated decreased alpha EEG power in frontal and occipital areas relative to healthy controls. With SSVEP stimulation centered in the alpha band (10Hz), but not with stimulation above (15Hz) or below (7Hz) this range, the occipital deficit in alpha power was partially reverted. However, the frontal deficit persisted and contributed to a significantly reduced topographic relationship between occipital and frontal alpha activity for resting EEG and 10Hz SSVEP alpha power in schizophrenia patients. No significant differences were observed between healthy and medicated controls or between medicated controls and schizophrenia. These findings suggest a potential intrinsic deficit in frontal eyes-closed EEG alpha oscillations in schizophrenia, whereby potent visual stimulation centered in that frequency range results in an increase in the occipital alpha power of these patients, which however does not extend to frontal regions. Future research to evaluate the cortical and subcortical mechanisms of these effects is warranted.
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Affiliation(s)
- Michael R Goldstein
- Department of Psychiatry, University of Wisconsin, Madison, WI, United States; Department of Psychology, University of Arizona, Tucson, AZ, United States
| | - Michael J Peterson
- Department of Psychiatry, University of Wisconsin, Madison, WI, United States
| | | | - Giulio Tononi
- Department of Psychiatry, University of Wisconsin, Madison, WI, United States
| | - Fabio Ferrarelli
- Department of Psychiatry, University of Wisconsin, Madison, WI, United States.
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Silverstein SM, Harms MP, Carter CS, Gold JM, Keane BP, MacDonald A, Ragland JD, Barch DM. Cortical contributions to impaired contour integration in schizophrenia. Neuropsychologia 2015; 75:469-80. [PMID: 26160288 PMCID: PMC4546547 DOI: 10.1016/j.neuropsychologia.2015.07.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 07/01/2015] [Accepted: 07/03/2015] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Visual perceptual organization impairments in schizophrenia (SCZ) are well established, but their neurobiological bases are not. The current study used the previously validated Jittered Orientation Visual Integration (JOVI) task, along with fMRI, to examine the neural basis of contour integration (CI), and its impairment in SCZ. CI is an aspect of perceptual organization in which multiple distinct oriented elements are grouped into a single continuous boundary or shape. METHODS On the JOVI, five levels of orientational jitter were added to non-contiguous closed contour elements embedded in background noise to progressively increase the difficulty in perceiving contour elements as left- or right-pointing ovals. Multi-site fMRI data were analyzed for 56 healthy control subjects and 47 people with SCZ. RESULTS SCZ patients demonstrated poorer CI, and this was associated with increased activation in regions involved in global shape processing and visual attention, namely the lateral occipital complex and superior parietal lobules. There were no brain regions where controls demonstrated more activation than patients. CONCLUSIONS CI impairment in this sample of outpatients with SCZ was related to excessive activation in regions associated with object processing and allocation of visual-spatial attention. There was no evidence for basic impairments in contour element linking in the fMRI data. The latter may be limited to poor outcome patients, where more extensive structural and functional changes in the occipital lobe have been observed.
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Affiliation(s)
| | | | | | - James M Gold
- University of Maryland, Maryland Psychiatric Research Center, United States
| | - Brian P Keane
- Rutgers, The State University of New Jersey, United States
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Rentzsch J, Shen C, Jockers-Scherübl MC, Gallinat J, Neuhaus AH. Auditory mismatch negativity and repetition suppression deficits in schizophrenia explained by irregular computation of prediction error. PLoS One 2015; 10:e0126775. [PMID: 25955846 PMCID: PMC4425493 DOI: 10.1371/journal.pone.0126775] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 04/07/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The predictive coding model is rapidly gaining attention in schizophrenia research. It posits the neuronal computation of residual variance ('prediction error') between sensory information and top-down expectation through multiple hierarchical levels. Event-related potentials (ERP) reflect cortical processing stages that are increasingly interpreted in the light of the predictive coding hypothesis. Both mismatch negativity (MMN) and repetition suppression (RS) measures are considered a prediction error correlates based on error detection and error minimization, respectively. METHODS Twenty-five schizophrenia patients and 25 healthy controls completed auditory tasks designed to elicit MMN and RS responses that were investigated using repeated measures models and strong spatio-temporal a priori hypothesis based on previous research. Separate correlations were performed for controls and schizophrenia patients, using age and clinical variables as covariates. RESULTS MMN and RS deficits were largely replicated in our sample of schizophrenia patients. Moreover, MMN and RS measures were strongly correlated in healthy controls, while no correlation was found in schizophrenia patients. Single-trial analyses indicated significantly lower signal-to-noise ratio during prediction error computation in schizophrenia. CONCLUSIONS This study provides evidence that auditory ERP components relevant for schizophrenia research can be reconciled in the light of the predictive coding framework. The lack of any correlation between the investigated measures in schizophrenia patients suggests a disruption of predictive coding mechanisms in general. More specifically, these results suggest that schizophrenia is associated with an irregular computation of residual variance between sensory input and top-down models, i.e. prediction error.
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Affiliation(s)
- Johannes Rentzsch
- Department of Psychiatry, Charité University Medicine, Berlin, Germany
| | - Christina Shen
- Department of Psychiatry, Charité University Medicine, Berlin, Germany
| | - Maria C. Jockers-Scherübl
- Department of Psychiatry, Charité University Medicine, Berlin, Germany
- Department of Psychiatry, Oberhavel Hospital, Hennigsdorf, Germany
| | - Jürgen Gallinat
- Department of Psychiatry, Charité University Medicine, Berlin, Germany
- Department of Psychiatry, University Hospital Eppendorf, Hamburg, Germany
| | - Andres H. Neuhaus
- Department of Psychiatry, Charité University Medicine, Berlin, Germany
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Knott V, Impey D, Choueiry J, Smith D, de la Salle S, Saghir S, Smith M, Beaudry E, Ilivitsky V, Labelle A. An acute dose, randomized trial of the effects of CDP-Choline on Mismatch Negativity (MMN) in healthy volunteers stratified by deviance detection level. ACTA ACUST UNITED AC 2015. [DOI: 10.1186/s40810-014-0002-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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27
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Light GA, Swerdlow NR. Future clinical uses of neurophysiological biomarkers to predict and monitor treatment response for schizophrenia. Ann N Y Acad Sci 2015. [PMID: 25752648 DOI: 10.llll/nyas.12730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Advances in psychiatric neuroscience have transformed our understanding of impaired and spared brain functions in psychotic illnesses. Despite substantial progress, few (if any) laboratory tests have graduated to clinics to inform diagnoses, guide treatments, and monitor treatment response. Providers must rely on careful behavioral observation and interview techniques to make inferences about patients' inner experiences and then secondary deductions about impacted neural systems. Development of more effective treatments has also been hindered by a lack of translational quantitative biomarkers that can span the brain-behavior treatment knowledge gap. Here, we describe an example of a simple, low-cost, and translatable electroencephalography (EEG) measure that offers promise for improving our understanding and treatment of psychotic illnesses: mismatch negativity (MMN). MMN is sensitive to and/or predicts response to some pharmacologic and nonpharmacologic interventions and accounts for substantial portions of variance in clinical, cognitive, and psychosocial functioning in schizophrenia (SZ). This measure has recently been validated for use in large-scale multisite clinical studies of SZ. Finally, MMN greatly improves our ability to forecast which individuals at high clinical risk actually develop a psychotic illness. These attributes suggest that MMN can contribute to personalized biomarker-guided treatment strategies aimed at ameliorating or even preventing the onset of psychosis.
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Affiliation(s)
- Gregory A Light
- VISN 22 Mental Illness, Research, Education, and Clinical Center (MIRECC), VA San Diego Healthcare System, San Diego, California; Department of Psychiatry, University of California San Diego, La Jolla, California
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28
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Light GA, Swerdlow NR. Future clinical uses of neurophysiological biomarkers to predict and monitor treatment response for schizophrenia. Ann N Y Acad Sci 2015; 1344:105-19. [PMID: 25752648 DOI: 10.1111/nyas.12730] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Advances in psychiatric neuroscience have transformed our understanding of impaired and spared brain functions in psychotic illnesses. Despite substantial progress, few (if any) laboratory tests have graduated to clinics to inform diagnoses, guide treatments, and monitor treatment response. Providers must rely on careful behavioral observation and interview techniques to make inferences about patients' inner experiences and then secondary deductions about impacted neural systems. Development of more effective treatments has also been hindered by a lack of translational quantitative biomarkers that can span the brain-behavior treatment knowledge gap. Here, we describe an example of a simple, low-cost, and translatable electroencephalography (EEG) measure that offers promise for improving our understanding and treatment of psychotic illnesses: mismatch negativity (MMN). MMN is sensitive to and/or predicts response to some pharmacologic and nonpharmacologic interventions and accounts for substantial portions of variance in clinical, cognitive, and psychosocial functioning in schizophrenia (SZ). This measure has recently been validated for use in large-scale multisite clinical studies of SZ. Finally, MMN greatly improves our ability to forecast which individuals at high clinical risk actually develop a psychotic illness. These attributes suggest that MMN can contribute to personalized biomarker-guided treatment strategies aimed at ameliorating or even preventing the onset of psychosis.
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Affiliation(s)
- Gregory A Light
- VISN 22 Mental Illness, Research, Education, and Clinical Center (MIRECC), VA San Diego Healthcare System, San Diego, California; Department of Psychiatry, University of California San Diego, La Jolla, California
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Young JW, Geyer MA. Developing treatments for cognitive deficits in schizophrenia: the challenge of translation. J Psychopharmacol 2015; 29:178-96. [PMID: 25516372 PMCID: PMC4670265 DOI: 10.1177/0269881114555252] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Schizophrenia is a life-long debilitating mental disorder affecting tens of millions of people worldwide. The serendipitous discovery of antipsychotics focused pharmaceutical research on developing a better antipsychotic. Our understanding of the disorder has advanced however, with the knowledge that cognitive enhancers are required for patients in order to improve their everyday lives. While antipsychotics treat psychosis, they do not enhance cognition and hence are not antischizophrenics. Developing pro-cognitive therapeutics has been extremely difficult, however, especially when no approved treatment exists. In lieu of stumbling on an efficacious treatment, developing targeted compounds can be facilitated by understanding the neural mechanisms underlying altered cognitive functioning in patients. Equally importantly, these cognitive domains will need to be measured similarly in animals and humans so that novel targets can be tested prior to conducting expensive clinical trials. To date, the limited similarity of testing across species has resulted in a translational bottleneck. In this review, we emphasize that schizophrenia is a disorder characterized by abnormal cognitive behavior. Quantifying these abnormalities using tasks having cross-species validity would enable the quantification of comparable processes in rodents. This approach would increase the likelihood that the neural substrates underlying relevant behaviors will be conserved across species. Hence, we detail cross-species tasks which can be used to test the effects of manipulations relevant to schizophrenia and putative therapeutics. Such tasks offer the hope of providing a bridge between non-clinical and clinical testing that will eventually lead to treatments developed specifically for patients with deficient cognition.
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Affiliation(s)
- JW Young
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - MA Geyer
- Research Service, VA San Diego Healthcare System, San Diego, CA, USA
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Mismatch negativity (MMN) deficiency: a break-through biomarker in predicting psychosis onset. Int J Psychophysiol 2015; 95:338-44. [PMID: 25562834 DOI: 10.1016/j.ijpsycho.2014.12.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 12/14/2014] [Accepted: 12/26/2014] [Indexed: 11/24/2022]
Abstract
Currently, the mismatch negativity (MMN) deficit is one of the most robust and replicable findings in schizophrenia, reflecting cognitive and functional decline, psychosocial and socio-occupational impairment, and executive dysfunction in these patients. An important break-through has very recently taken place here in the prediction of conversion to psychosis when the MMN in particular to change in tone duration was recorded in clinically at risk-mental state (ARMS) individuals. Attenuations in the MMN in these patients may be very useful in helping clinicians determine who are most likely to develop a psychotic disorder, as we will review in the present article.
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Rissling AJ, Miyakoshi M, Sugar CA, Braff DL, Makeig S, Light GA. Cortical substrates and functional correlates of auditory deviance processing deficits in schizophrenia. NEUROIMAGE-CLINICAL 2014; 6:424-37. [PMID: 25379456 PMCID: PMC4218942 DOI: 10.1016/j.nicl.2014.09.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/18/2014] [Accepted: 09/11/2014] [Indexed: 12/21/2022]
Abstract
Although sensory processing abnormalities contribute to widespread cognitive and psychosocial impairments in schizophrenia (SZ) patients, scalp-channel measures of averaged event-related potentials (ERPs) mix contributions from distinct cortical source-area generators, diluting the functional relevance of channel-based ERP measures. SZ patients (n = 42) and non-psychiatric comparison subjects (n = 47) participated in a passive auditory duration oddball paradigm, eliciting a triphasic (Deviant−Standard) tone ERP difference complex, here termed the auditory deviance response (ADR), comprised of a mid-frontal mismatch negativity (MMN), P3a positivity, and re-orienting negativity (RON) peak sequence. To identify its cortical sources and to assess possible relationships between their response contributions and clinical SZ measures, we applied independent component analysis to the continuous 68-channel EEG data and clustered the resulting independent components (ICs) across subjects on spectral, ERP, and topographic similarities. Six IC clusters centered in right superior temporal, right inferior frontal, ventral mid-cingulate, anterior cingulate, medial orbitofrontal, and dorsal mid-cingulate cortex each made triphasic response contributions. Although correlations between measures of SZ clinical, cognitive, and psychosocial functioning and standard (Fz) scalp-channel ADR peak measures were weak or absent, for at least four IC clusters one or more significant correlations emerged. In particular, differences in MMN peak amplitude in the right superior temporal IC cluster accounted for 48% of the variance in SZ-subject performance on tasks necessary for real-world functioning and medial orbitofrontal cluster P3a amplitude accounted for 40%/54% of SZ-subject variance in positive/negative symptoms. Thus, source-resolved auditory deviance response measures including MMN may be highly sensitive to SZ clinical, cognitive, and functional characteristics. Six source clusters contributing to the triphasic auditory deviance response were identified. Source resolved responses are sensitive to SZ clinical, cognitive, and function characteristics. Source resolved responses accounted for up to half the variance in cognitive and symptom scales.
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Affiliation(s)
- Anthony J Rissling
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Makoto Miyakoshi
- Swartz Center for Computational Neuroscience, Institute for Neural Computation, University of California San Diego, La Jolla, CA, USA ; Japan Society for the Promotion of Science, Japan
| | - Catherine A Sugar
- Department of Psychiatry, University of California Los Angeles, Los Angeles, CA, USA ; Department of Biostatistics, University of California Los Angeles, Los Angeles, CA, USA ; VISN-22 Mental Illness, Research, Education and Clinical Center (MIRECC), Greater Los Angeles VA Healthcare System, Los Angeles, CA, USA
| | - David L Braff
- VISN-22 Mental Illness, Research, Education and Clinical Center (MIRECC), VA San Diego Healthcare System, Los Angeles, CA, USA ; Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Scott Makeig
- Swartz Center for Computational Neuroscience, Institute for Neural Computation, University of California San Diego, La Jolla, CA, USA
| | - Gregory A Light
- VISN-22 Mental Illness, Research, Education and Clinical Center (MIRECC), VA San Diego Healthcare System, Los Angeles, CA, USA ; Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
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González-Hernández JA, Pita-Alcorta C, Padrón A, Finalé A, Galán L, Martínez E, Díaz-Comas L, Samper-González JA, Lencer R, Marot M. Basic visual dysfunction allows classification of patients with schizophrenia with exceptional accuracy. Schizophr Res 2014; 159:226-33. [PMID: 25176497 DOI: 10.1016/j.schres.2014.07.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Revised: 07/28/2014] [Accepted: 07/31/2014] [Indexed: 10/24/2022]
Abstract
Basic visual dysfunctions are commonly reported in schizophrenia; however their value as diagnostic tools remains uncertain. This study reports a novel electrophysiological approach using checkerboard visual evoked potentials (VEP). Sources of spectral resolution VEP-components C1, P1 and N1 were estimated by LORETA, and the band-effects (BSE) on these estimated sources were explored in each subject. BSEs were Z-transformed for each component and relationships with clinical variables were assessed. Clinical effects were evaluated by ROC-curves and predictive values. Forty-eight patients with schizophrenia (SZ) and 55 healthy controls participated in the study. For each of the 48 patients, the three VEP components were localized to both dorsal and ventral brain areas and also deviated from a normal distribution. P1 and N1 deviations were independent of treatment, illness chronicity or gender. Results from LORETA also suggest that deficits in thalamus, posterior cingulum, precuneus, superior parietal and medial occipitotemporal areas were associated with symptom severity. While positive symptoms were more strongly related to sensory processing deficits (P1), negative symptoms were more strongly related to perceptual processing dysfunction (N1). Clinical validation revealed positive and negative predictive values for correctly classifying SZ of 100% and 77%, respectively. Classification in an additional independent sample of 30 SZ corroborated these results. In summary, this novel approach revealed basic visual dysfunctions in all patients with schizophrenia, suggesting these visual dysfunctions represent a promising candidate as a biomarker for schizophrenia.
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Affiliation(s)
- J A González-Hernández
- Departments of Neurophysiology and Psychiatry, "Hermanos-Ameijeiras" Hospital, University of Medical Science of Havana, Cuba; Department of Psychiatry and Psychotherapy, University of Münster, Germany.
| | - C Pita-Alcorta
- Department of Psychiatry, "Manuel Fajardo" Hospital, University of Medical Science of Havana, Cuba
| | - A Padrón
- Departments of Neurophysiology and Psychiatry, "Hermanos-Ameijeiras" Hospital, University of Medical Science of Havana, Cuba
| | - A Finalé
- Departments of Neurophysiology and Psychiatry, "Hermanos-Ameijeiras" Hospital, University of Medical Science of Havana, Cuba
| | - L Galán
- Departments of Neurostatistics and Neuroinformatics, Cuban Neuroscience Center, Havana, Cuba
| | - E Martínez
- Departments of Neurostatistics and Neuroinformatics, Cuban Neuroscience Center, Havana, Cuba
| | - L Díaz-Comas
- Departments of Neurostatistics and Neuroinformatics, Cuban Neuroscience Center, Havana, Cuba
| | | | - R Lencer
- Department of Psychiatry and Psychotherapy, University of Münster, Germany
| | - M Marot
- Departments of Neurophysiology and Psychiatry, "Hermanos-Ameijeiras" Hospital, University of Medical Science of Havana, Cuba
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Knott V, Impey D, Philippe T, Smith D, Choueiry J, de la Salle S, Dort H. Modulation of auditory deviance detection by acute nicotine is baseline and deviant dependent in healthy nonsmokers: a mismatch negativity study. Hum Psychopharmacol 2014; 29:446-58. [PMID: 25196041 DOI: 10.1002/hup.2418] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 03/19/2014] [Accepted: 05/19/2014] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Cognitive enhancement resulting from nicotinic acetylcholine receptor stimulation may be evidenced by increased efficiency of the auditory-frontal cortex network of auditory discrimination, which is impaired in schizophrenia, a cognitive disorder associated with excessive tobacco use. Investigating automatic (preattentive) detection of acoustic change with the mismatch negativity (MMN) brain event-related potential in response to nicotine in individuals with varying baseline levels of auditory discrimination may provide useful insight into the cholinergic regulation of this neural network and its potential amelioration with novel nicotinic agents. METHODS Sixty healthy, non-smoking male volunteers were presented with an 'optimal' multi-feature MMN paradigm in a randomized, placebo controlled double-blind design with 6 mg of nicotine gum. RESULTS Participants with low, medium, and high baseline amplitudes responded differently to nicotine (vs. placebo), and nicotine response was feature specific. Whereas MMN in individuals with high amplitudes was diminished by nicotine, MMN increased in those with low amplitudes. Nicotine effects were not shown in medium amplitude participants. CONCLUSIONS These findings provide preliminary support for the role of nicotinic neurotransmission in sensory memory processing of auditory change and suggest that nicotinic receptor modulation can both enhance and diminish change detection, depending on baseline MMN and its eliciting stimulus feature.
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Affiliation(s)
- Verner Knott
- University of Ottawa Institute of Mental Health Research, Ottawa, Ontario, Canada; School of Psychology, University of Ottawa, Ottawa, Ontario, Canada; Neuroscience Program, Department of Cellular and Molecular Medicine, University of Ottawa, Ontario, Canada
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Perez VB, Swerdlow NR, Braff DL, Näätänen R, Light GA. Using biomarkers to inform diagnosis, guide treatments and track response to interventions in psychotic illnesses. Biomark Med 2014; 8:9-14. [PMID: 24325220 DOI: 10.2217/bmm.13.133] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Veronica B Perez
- VISN-22 Mental Illness Research, Education & Clinical Center (MIRECC), VA San Diego Healthcare System, CA 92161, USA and Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
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Chen Y, Norton D, Stromeyer C. Prolonged temporal interaction for peripheral visual processing in schizophrenia: evidence from a three-flash illusion. Schizophr Res 2014; 156:190-6. [PMID: 24814873 PMCID: PMC4096562 DOI: 10.1016/j.schres.2014.04.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/09/2014] [Accepted: 04/17/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Coherent perception of the visual world requires orderly processing of spatially and temporally distributed visual information across the visual field. The organization of this visual information is impaired in schizophrenia. We previously found that visual temporal integration in patients is prolonged, using flashes presented to the central fovea. In this study, we investigated this temporal interaction in both the fovea and fairly far out in the peripheral visual field. METHODS We used a 'three-flash' illusion paradigm in which two spatially-coincident light pulses (of 1 ms each) are perceived by healthy individuals as one, two or three flashes depending on the time interval between the pulses. In each trial, two light pulses were presented in the fovea or 34° out in the right visual field. The inter-stimulus pulse interval (ISI) ranged from 30 to 310 ms. The task for patients (n=28) and controls (n=26) was to indicate the number of flashes (one, two or three) perceived after each two-pulse presentation. RESULTS For the controls, the peak of the three-flash illusion was shifted to longer ISIs (150 ms) in the periphery compared to the fovea (110 ms). For the patients, the three-flash illusion was greater and occurred at longer ISIs (270 ms in the periphery and 190 ms at the fovea). CONCLUSION Compared to the central visual field, the range of temporal interactions in the periphery is prolonged to a greater extent in schizophrenia. This exacerbated temporal expansion in peripheral vision suggests a coarse temporal resolution for visual and cognitive organization in this mental disorder.
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Affiliation(s)
- Yue Chen
- McLean Hospital, Department of Psychiatry, Harvard Medical School, United States.
| | | | - Charles Stromeyer
- Division of Applied Sciences and Engineering, Harvard University (emeritus)
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Light GA, Swerdlow NR. Neurophysiological biomarkers informing the clinical neuroscience of schizophrenia: mismatch negativity and prepulse inhibition of startle. Curr Top Behav Neurosci 2014; 21:293-314. [PMID: 24850080 PMCID: PMC5951188 DOI: 10.1007/7854_2014_316] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
With the growing recognition of the heterogeneity of major brain disorders, and particularly the schizophrenias (SZ), biomarkers are being sought that parse patient groups in ways that can be used to predict treatment response, prognosis, and pathophysiology. A primary focus to date has been to identify biomarkers that predict damage or dysfunction within brain systems in SZ patients, that could then serve as targets for interventions designed to "undo" the causative pathology. After almost 50 years as the predominant strategy for developing SZ therapeutics, evidence supporting the value of this "find what's broke and fix it" approach is lacking. Here, we suggest an alternative strategy of using biomarkers to identify evidence of spared neural and cognitive function in SZ patients, and matching these residual neural assets with therapies toward which they can be applied. We describe ways to extract and interpret evidence of "spared function," using neurocognitive, and neurophysiological measures, and, suggest that further evidence of available neuroplasticity might be gleaned from studies in which the response to drug challenges and "practice effects" are measured. Finally, we discuss examples in which "better" (more normal) performance in specific neurophysiological measures predict a positive response to a neurocognitive task or therapeutic intervention. We believe that our field stands to gain tremendous therapeutic leverage by focusing less on what is "wrong" with our patients, and instead, focusing more on what is "right".
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Affiliation(s)
- Gregory A Light
- Department of Psychiatry, School of Medicine, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093-0804, USA
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Tso IF, Carp J, Taylor SF, Deldin PJ. Role of visual integration in gaze perception and emotional intelligence in schizophrenia. Schizophr Bull 2014; 40:617-25. [PMID: 23666503 PMCID: PMC3984511 DOI: 10.1093/schbul/sbt058] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Individuals with schizophrenia demonstrate a wide range of social cognitive deficits that significantly compromise functioning. Early visual processing is frequently disrupted in schizophrenia, and growing evidence suggests a role of perceptual dysfunctions in socioemotional functioning in the disorder. This study examined visual integration (the ability to effectively integrate individual, local visual features into a holistic representation), a target construct of basic perception identified by the Cognitive Neuroscience Treatment Research to Improve Cognition in Schizophrenia initiative, and its relationship with eye- contact perception and emotional intelligence in schizophrenia. METHODS Twenty-nine participants with schizophrenia (SCZ) and 23 healthy controls (HC) completed tasks measuring visual integration (Coherent Motion Task, Contour Integration Task), an eye-contact perception task, and a measure of emotional intelligence. RESULTS SCZ participants showed compromised visual integration as suggested by poorer performance on the Contour Integration Task relative to HC. Visual integration was a significant predictor of eye-contact perception and emotional intelligence among SCZ. The amounts of variances in these 2 social cognitive areas accounted for by visual integration were comparable to and overlapped with those accounted for by the diagnosis of schizophrenia. CONCLUSIONS Individuals with schizophrenia showed compromised visual integration, and this may play a significant role in the observed deficits in higher level processing of social information in the disorder.
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Affiliation(s)
- Ivy F. Tso
- Department of Psychology, University of Michigan, Ann Arbor, MI;,Department of Psychiatry, University of Michigan, Ann Arbor, MI,*To whom correspondence should be addressed; 4250 Plymouth Road, Ann Arbor, MI 48109, US; tel: (734) 232-0373, fax: (734) 736-7868, e-mail:
| | - Joshua Carp
- Department of Psychology, University of Michigan, Ann Arbor, MI
| | | | - Patricia J. Deldin
- Department of Psychology, University of Michigan, Ann Arbor, MI;,Department of Psychiatry, University of Michigan, Ann Arbor, MI
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Todd J, Whitson L, Smith E, Michie PT, Schall U, Ward PB. What's intact and what's not within the mismatch negativity system in schizophrenia. Psychophysiology 2014; 51:337-47. [PMID: 24611871 DOI: 10.1111/psyp.12181] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 11/13/2013] [Indexed: 11/30/2022]
Abstract
Repetitive patterning facilitates inferences about likely properties of sound to follow. Mismatch negativity (MMN) occurs when sound fails to match an inference. Smaller MMN in schizophrenia indexes deficient gain control (difference in utilizing a limited dynamic range). Although it is clear that this group has a lower limit to MMN size, this study addressed whether smaller MMN indicates impaired perceptual inference. MMN was elicited to four deviants in two sequences: one in which occurrence was random and one in which it was paired. Despite smaller MMN, persons with schizophrenia are equally able to reduce MMN size evoked by a deviant when its occurrence is cued. Results also expose alterations in the evoked response to repeated sounds that appear to be exacerbations of age-related amplitude decline. Since these anomalies impact the computed MMN, they highlight the need to identify all contributions to limits in gain control in schizophrenia.
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Affiliation(s)
- Juanita Todd
- School of Psychology, University of Newcastle, Callaghan, Australia; Priority Research Centre, Translational Neuroscience and Mental Health Research, University of Newcastle, Callaghan, Australia; Schizophrenia Research Institute, Darlinghurst, Australia
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Remington G, Foussias G, Agid O, Fervaha G, Takeuchi H, Hahn M. The neurobiology of relapse in schizophrenia. Schizophr Res 2014; 152:381-90. [PMID: 24206930 DOI: 10.1016/j.schres.2013.10.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 10/06/2013] [Accepted: 10/08/2013] [Indexed: 12/30/2022]
Abstract
Dopamine's proposed role in psychosis proved a starting point in our understanding of the neurobiology of relapse, fitting given the central role positive symptoms play. This link is reflected in early work examining neurotransmitter metabolite and drug (e.g. amphetamine, methylphenidate) challenge studies as a means of better understanding relapse and predictors. Since, lines of investigation have expanded (e.g. electrophysiological, immunological, hormonal, stress), an important step forward if relapse per se is the question. Arguably, perturbations in dopamine represent the final common pathway in psychosis but it is evident that, like schizophrenia, relapse is heterogeneous and multidimensional. In understanding the neurobiology of relapse, greater gains are likely to be made if these distinctions are acknowledged; for example, efforts to identify trait markers might better be served by distinguishing primary (i.e. idiopathic) and secondary (e.g. substance abuse, medication nonadherence) forms of relapse. Similarly, it has been suggested that relapse is 'neurotoxic', yet individuals do very well on clozapine after multiple relapses and the designation of treatment resistance. An alternative explanation holds that schizophrenia is characterized by different trajectories, at least to some extent biologically and/or structurally distinguishable from the outset, with differential patterns of response and relapse. Just as with schizophrenia, it seems naïve to conceptualize the neurobiology of relapse as a singular process. We propose that it is shaped by the form of illness and in place from the outset, modified by constitutional factors like resilience, as well as treatment, and confounded by secondary forms of relapse.
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Affiliation(s)
- Gary Remington
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Toronto, Ontario, Canada.
| | - George Foussias
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Ofer Agid
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | - Gagan Fervaha
- Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada; Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Hiroyoshi Takeuchi
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | - Margaret Hahn
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
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What controls gain in gain control? Mismatch negativity (MMN), priors and system biases. Brain Topogr 2013; 27:578-89. [DOI: 10.1007/s10548-013-0344-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 12/07/2013] [Indexed: 10/25/2022]
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Kaser M, Soltesz F, Lawrence P, Miller S, Dodds C, Croft R, Dudas RB, Zaman R, Fernandez-Egea E, Müller U, Dean A, Bullmore ET, Nathan PJ. Oscillatory underpinnings of mismatch negativity and their relationship with cognitive function in patients with schizophrenia. PLoS One 2013; 8:e83255. [PMID: 24358266 PMCID: PMC3866183 DOI: 10.1371/journal.pone.0083255] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 10/31/2013] [Indexed: 11/23/2022] Open
Abstract
Background Impairments in mismatch negativity (MMN) generation have been consistently reported in patients with schizophrenia. However, underlying oscillatory activity of MMN deficits in schizophrenia and the relationship with cognitive impairments have not been investigated in detail. Time-frequency power and phase analyses can provide more detailed measures of brain dynamics of MMN deficits in schizophrenia. Method 21 patients with schizophrenia and 21 healthy controls were tested with a roving frequency paradigm to generate MMN. Time-frequency domain power and phase-locking (PL) analysis was performed on all trials using short-time Fourier transforms with Hanning window tapering. A comprehensive battery (CANTAB) was used to assess neurocognitive functioning. Results Mean MMN amplitude was significantly lower in patients with schizophrenia (95% CI 0.18 - 0.77). Patients showed significantly lower EEG power (95% CI -1.02 - -0.014) in the ~4-7 Hz frequency range (theta band) between 170 and 210 ms. Patients with schizophrenia showed cognitive impairment in multiple domains of CANTAB. However, MMN impairments in amplitude and power were not correlated with clinical measures, medication dose, social functioning or neurocognitive performance. Conclusion The findings from this study suggested that while MMN may be a useful marker to probe NMDA receptor mediated mechanisms and associated impairments in gain control and perceptual changes, it may not be a useful marker in association with clinical or cognitive changes. Trial-by-trial EEG power analysis can be used as a measure of brain dynamics underlying MMN deficits which also can have implications for the use of MMN as a biomarker for drug discovery.
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Affiliation(s)
- Muzaffer Kaser
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- Bahcesehir University, Istanbul, Turkey
- Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, United Kingdom
- * E-mail:
| | - Fruzsina Soltesz
- GlaxoSmithKline, Clinical Unit Cambridge, Medicines Discovery and Development, Cambridge, United Kingdom
| | - Phil Lawrence
- GlaxoSmithKline, Clinical Unit Cambridge, Medicines Discovery and Development, Cambridge, United Kingdom
| | - Sam Miller
- GlaxoSmithKline, Clinical Unit Cambridge, Medicines Discovery and Development, Cambridge, United Kingdom
| | - Chris Dodds
- GlaxoSmithKline, Clinical Unit Cambridge, Medicines Discovery and Development, Cambridge, United Kingdom
| | - Rodney Croft
- Department of Psychology, University of Wollongong, Wollongong, Australia
| | - Robert B. Dudas
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- Cambridge and Peterborough NHS Foundation Trust, United Kingdom
| | - Rashid Zaman
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- South Essex Partnership NHS Foundation Trust, United Kingdom
| | - Emilio Fernandez-Egea
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, United Kingdom
- Cambridge and Peterborough NHS Foundation Trust, United Kingdom
| | - Ulrich Müller
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- Cambridge and Peterborough NHS Foundation Trust, United Kingdom
| | - Anna Dean
- Brain Mapping Unit, Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | - Edward T. Bullmore
- Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, United Kingdom
- GlaxoSmithKline, Clinical Unit Cambridge, Medicines Discovery and Development, Cambridge, United Kingdom
- Cambridge and Peterborough NHS Foundation Trust, United Kingdom
- Brain Mapping Unit, Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | - Pradeep J. Nathan
- Brain Mapping Unit, Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
- School of Psychology and Psychiatry, Monash University, Melbourne, Australia
- Neuroscience Discovery Medicine, UCB Pharma, Brussels, Belgium
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Kelemen O, Kovács T, Kéri S. Contrast, motion, perceptual integration, and neurocognition in schizophrenia: the role of fragile-X related mechanisms. Prog Neuropsychopharmacol Biol Psychiatry 2013; 46:92-7. [PMID: 23838275 DOI: 10.1016/j.pnpbp.2013.06.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 06/23/2013] [Accepted: 06/27/2013] [Indexed: 10/26/2022]
Abstract
Recent studies demonstrated a reduced expression of Fragile X Mental Retardation Protein (FMRP), an RNA binding protein and translation regulator, in the brain and peripheral lymphocytes of patients with schizophrenia. Low FMRP levels may be related to impaired neurodevelopmental processes and synaptic plasticity. Here, we studied the relationship between peripheral FMRP level, visual perception (contrast sensitivity, perceptual integration, motion/form perception), and neuropsychological functions in schizophrenia as measured with the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). Results revealed that patients with schizophrenia displayed lower FMRP levels in peripheral lymphocytes as compared to control individuals. We found significant correlations between FMRP levels and contrast sensitivity at low spatial and high temporal frequencies, perceptual integration, and motion perception. The relationship between FMRP level and neuropsychological functions was less pronounced than that seen in the case of visual perception, with the greatest effect for RBANS attention. FMRP level was not related to contrast sensitivity at high spatial and low temporal frequencies and form perception. This pattern of data is reminiscent to that observed in patients with Fragile X Syndrome (FXS). These results suggest that FMRP may be implicated in the pathogenesis of schizophrenia, possibly via the regulation of neurodevelopment, plasticity, GABA-ergic, and glutamatergic neurotransmission.
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Affiliation(s)
- Oguz Kelemen
- Bács-Kiskun County Hospital, Psychiatry Center, Kecskemét, Hungary
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43
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Silverstein SM, Keane BP, Wang Y, Mikkilineni D, Paterno D, Papathomas TV, Feigenson K. Effects of short-term inpatient treatment on sensitivity to a size contrast illusion in first-episode psychosis and multiple-episode schizophrenia. Front Psychol 2013; 4:466. [PMID: 23898311 PMCID: PMC3721030 DOI: 10.3389/fpsyg.2013.00466] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 07/03/2013] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION In the Ebbinghaus illusion, a shape appears larger than its actual size when surrounded by small shapes and smaller than its actual size when surrounded by large shapes. Resistance to this visual illusion has been previously reported in schizophrenia, and linked to disorganized symptoms and poorer prognosis in cross-sectional studies. It is unclear, however, when in the course of illness this resistance first emerges or how it varies longitudinally with illness phase. METHOD We addressed these issues by having first-episode psychosis patients, multiple-episode schizophrenia patients and healthy controls complete a psychophysical task at two different time points, corresponding to hospital admission and discharge for patients. The task required judging the relative size of two circular targets centered on either side of the screen. Targets were presented without context (baseline), or were surrounded by shapes that made the size judgment harder or easier (misleading and helpful contexts, respectively). Context sensitivity was operationalized as the amount of improvement relative to baseline in the helpful condition minus the amount of decrement relative to baseline in the misleading condition. RESULTS At hospital admission, context sensitivity was lower in the multiple-episode group than in the other groups, and was marginally less in the first episode than in the control group. In addition, schizophrenia patients were significantly more and less accurate than the other groups in the misleading and helpful conditions, respectively. At discharge, all groups exhibited similar context sensitivity. In general, poorer context sensitivity was related to higher levels of disorganized symptoms, and lower level of depression, excitement, and positive symptoms. DISCUSSION Resistance to the Ebbinghaus illusion, as a characteristic of the acute phase of illness in schizophrenia, increases in magnitude after the first episode of psychosis. This suggests that visual context processing is a state-marker in schizophrenia and a biomarker of relapse and recovery.
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Affiliation(s)
- Steven M. Silverstein
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
| | - Brian P. Keane
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
- Center for Cognitive Science, Rutgers UniversityNew Brunswick, NJ, USA
| | - Yushi Wang
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
| | - Deepthi Mikkilineni
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
| | - Danielle Paterno
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
| | | | - Keith Feigenson
- Rutgers University Behavioral Health Care, and Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers Biomedical and Health SciencesPiscataway, NJ, USA
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Animal models and measures of perceptual processing in schizophrenia. Neurosci Biobehav Rev 2013; 37:2092-8. [PMID: 23867801 DOI: 10.1016/j.neubiorev.2013.06.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 06/16/2013] [Accepted: 06/18/2013] [Indexed: 01/14/2023]
Abstract
This paper summarizes the discussions regarding animal paradigms for assessing perception at the seventh meeting of the Cognitive Neuroscience Treatment Research to Improve Cognition in Schizophrenia (CNTRICS). A breakout group at the meeting addressed candidate tests in animals that might best parallel the human paradigms selected previously in the CNTRICS program to assess two constructs in the domain of perception: gain control and visual integration. The perception breakout group evaluated the degree to which each of the nominated tasks met pre-specified criteria: comparability of tasks across multiple species; construct validity; neuroanatomical homology between species; and dynamic range across parametric variation.
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Kim J, Norton D, McBain R, Ongur D, Chen Y. Deficient biological motion perception in schizophrenia: results from a motion noise paradigm. Front Psychol 2013; 4:391. [PMID: 23847566 PMCID: PMC3701139 DOI: 10.3389/fpsyg.2013.00391] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 06/11/2013] [Indexed: 11/13/2022] Open
Abstract
Background: Schizophrenia patients exhibit deficient processing of perceptual and cognitive information. However, it is not well-understood how basic perceptual deficits contribute to higher level cognitive problems in this mental disorder. Perception of biological motion, a motion-based cognitive recognition task, relies on both basic visual motion processing and social cognitive processing, thus providing a useful paradigm to evaluate the potentially hierarchical relationship between these two levels of information processing. Methods: In this study, we designed a biological motion paradigm in which basic visual motion signals were manipulated systematically by incorporating different levels of motion noise. We measured the performances of schizophrenia patients (n = 21) and healthy controls (n = 22) in this biological motion perception task, as well as in coherent motion detection, theory of mind, and a widely used biological motion recognition task. Results: Schizophrenia patients performed the biological motion perception task with significantly lower accuracy than healthy controls when perceptual signals were moderately degraded by noise. A more substantial degradation of perceptual signals, through using additional noise, impaired biological motion perception in both groups. Performance levels on biological motion recognition, coherent motion detection and theory of mind tasks were also reduced in patients. Conclusion: The results from the motion-noise biological motion paradigm indicate that in the presence of visual motion noise, the processing of biological motion information in schizophrenia is deficient. Combined with the results of poor basic visual motion perception (coherent motion task) and biological motion recognition, the association between basic motion signals and biological motion perception suggests a need to incorporate the improvement of visual motion perception in social cognitive remediation.
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Affiliation(s)
- Jejoong Kim
- Department of Psychology, Duksung Women's University Seoul, South Korea
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Neuhaus AH, Brandt ESL, Goldberg TE, Bates JA, Malhotra AK. Evidence for impaired visual prediction error in schizophrenia. Schizophr Res 2013; 147:326-30. [PMID: 23628603 DOI: 10.1016/j.schres.2013.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 03/08/2013] [Accepted: 04/04/2013] [Indexed: 01/14/2023]
Abstract
BACKGROUND Mismatch negativity (MMN) is regarded a prediction error signal that is deficient in schizophrenia in the auditory modality. If, however, MMN reflects a general computational signal of the cortex, then MMN should be also deficient in the visual modality in schizophrenia patients. METHODS Twenty-two schizophrenia patients and 24 matched healthy controls finished a visual oddball task while high-density electroencephalogram was recorded. Visual mismatch negativity was computed as a surrogate marker of prediction error. RESULTS Visual MMN, as measured over posterior extra-striate cortical areas, was significantly reduced in schizophrenia at about 300 ms post stimulus. Standardized mean difference was -.98, corresponding to a large effect size. CONCLUSIONS A posterior visual MMN deficit in schizophrenia is demonstrated for the first time. Our results tentatively suggest a supra-modal MMN deficit in schizophrenia and thus argue in favor of reduced prediction error estimation in schizophrenia.
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Affiliation(s)
- Andres H Neuhaus
- Department of Psychiatry and Psychotherapy, Charité University Medicine, Campus Benjamin Franklin, Berlin, Germany.
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Phillips WA, Silverstein SM. The coherent organization of mental life depends on mechanisms for context-sensitive gain-control that are impaired in schizophrenia. Front Psychol 2013; 4:307. [PMID: 23755035 PMCID: PMC3666028 DOI: 10.3389/fpsyg.2013.00307] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/13/2013] [Indexed: 01/05/2023] Open
Abstract
There is rapidly growing evidence that schizophrenia involves changes in context-sensitive gain-control and probabilistic inference. In addition to the well-known cognitive disorganization to which these changes lead, basic aspects of vision are also impaired, as discussed by other papers on this Frontiers Research Topic. The aim of this paper is to contribute to our understanding of such findings by examining five central hypotheses. First, context-sensitive gain-control is fundamental to brain function and mental life. Second, it occurs in many different regions of the cerebral cortex of many different mammalian species. Third, it has several computational functions, each with wide generality. Fourth, it is implemented by several neural mechanisms at cellular and circuit levels. Fifth, impairments of context-sensitive gain-control produce many of the well-known symptoms of schizophrenia and change basic processes of visual perception. These hypotheses suggest why disorders of vision in schizophrenia may provide insights into the nature and mechanisms of impaired reality testing and thought disorder in psychosis. They may also cast light on normal mental function and its neural bases. Limitations of these hypotheses, and ways in which they need further testing and development, are outlined.
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Affiliation(s)
- William A Phillips
- Psychology, School of Natural Sciences, University of Stirling Stirling, UK ; Theoretical Neuroscience, Frankfurt Institute of Advanced Studies Frankfurt, Germany
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Butler PD, Abeles IY, Silverstein SM, Dias EC, Weiskopf NG, Calderone DJ, Sehatpour P. An event-related potential examination of contour integration deficits in schizophrenia. Front Psychol 2013; 4:132. [PMID: 23519476 PMCID: PMC3604636 DOI: 10.3389/fpsyg.2013.00132] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 03/03/2013] [Indexed: 11/23/2022] Open
Abstract
Perceptual organization, which refers to the ability to integrate fragments of stimuli to form a representation of a whole edge, part, or object, is impaired in schizophrenia. A contour integration paradigm, involving detection of a set of Gabor patches forming an oval contour pointing to the right or left embedded in a field of randomly oriented Gabors, has been developed for use in clinical trials of schizophrenia. The purpose of the present study was to assess contributions of early and later stages of processing to deficits in contour integration, as well as to develop an event-related potential (ERP) analog of this task. Twenty-one patients with schizophrenia and 28 controls participated. The Gabor elements forming the contours were given a low or high degree of orientational jitter, making it either easy or difficult to identify the direction in which the contour was pointing. ERP results showed greater negative peaks at ~165 (N1 component) and ~270 ms for the low-jitter versus the high-jitter contours, with a much greater difference between jitter conditions at 270 ms. This later ERP component was previously termed Ncl for closure negativity. Source localization identified the Ncl in the lateral occipital object recognition area. Patients showed a significant decrease in the Ncl, but not N1, compared to controls, and this was associated with impaired behavioral ability to identify contours. In addition, an earlier negative peak was found at ~120 ms (termed N120) that differentiated jitter conditions, had a dorsal stream source, and differed between patients and controls. Patients also showed a deficit in the dorsal stream sensory P1 component. These results are in accord with impairments in distributed circuitry contributing to perceptual organization deficits and provide an ERP analog to the behavioral contour integration task.
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Affiliation(s)
- Pamela D Butler
- Schizophrenia Research Division, Nathan S. Kline Institute for Psychiatric Research Orangeburg, NY, USA ; Department of Psychiatry, NYU School of Medicine New York, NY, USA ; Department of Psychology, City University of New York New York, NY, USA
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Halász I, Levy-Gigi E, Kelemen O, Benedek G, Kéri S. Neuropsychological functions and visual contrast sensitivity in schizophrenia: the potential impact of comorbid posttraumatic stress disorder (PTSD). Front Psychol 2013; 4:136. [PMID: 23519404 PMCID: PMC3602812 DOI: 10.3389/fpsyg.2013.00136] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 03/04/2013] [Indexed: 11/13/2022] Open
Abstract
Previous studies have revealed a high prevalence of posttraumatic stress disorder (PTSD) in patients with other severe mental disorders, including schizophrenia. However, the neuropsychological and psychophysical correlates of comorbid PTSD are less exactly defined. The purpose of the present study was to assess immediate and delayed memory, attention, visuospatial skills, language, and basic visual information processing in patients with schizophrenia with or without PTSD. We recruited 125 patients with schizophrenia and 70 healthy controls matched for visual acuity, age, gender, education, and socioeconomic status. Twenty-one of patients with schizophrenia exhibited comorbid PTSD. We administered the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) and visual contrast sensitivity tasks for low spatial/high temporal frequency (0.3 cycle/degree and 18 Hz) and high spatial/low temporal frequency (10 cycles/degree and 1Hz) sinusoidal gratings. All patients were clinically stable and received antipsychotic medications. Results revealed that relative to healthy controls, patients with schizophrenia exhibited significant and generalized neuropsychological dysfunctions and reduced visual contrast sensitivity, which was more pronounced at low spatial/high temporal frequency. When we compared schizophrenia patients with and without PTSD, we found that patients with comorbid PTSD displayed lower scores for RBANS attention, immediate and delayed memory, and visuospatial scores. Schizophrenia patients with or without PTSD displayed similar visual contrast sensitivity. In conclusion, comorbid PTSD in schizophrenia may be associated with worse neuropsychological functions, whereas it does not affect basic visual information processing.
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Affiliation(s)
| | - Einat Levy-Gigi
- Institute for the Study of Affective Neuroscience, University of HaifaHaifa, Israel
| | - Oguz Kelemen
- Psychiatry Center, Bács-Kiskun County HospitalKecskemét, Hungary
| | - György Benedek
- Department of Physiology, Faculty of Medicine, University of SzegedSzeged, Hungary
| | - Szabolcs Kéri
- National Psychiatry CenterBudapest, Hungary
- Department of Physiology, Faculty of Medicine, University of SzegedSzeged, Hungary
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Calderone DJ, Martinez A, Zemon V, Hoptman MJ, Hu G, Watkins JE, Javitt DC, Butler PD. Comparison of psychophysical, electrophysiological, and fMRI assessment of visual contrast responses in patients with schizophrenia. Neuroimage 2013; 67:153-62. [PMID: 23194815 PMCID: PMC3544989 DOI: 10.1016/j.neuroimage.2012.11.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 11/12/2012] [Accepted: 11/18/2012] [Indexed: 11/24/2022] Open
Abstract
Perception has been identified by the NIMH-sponsored Cognitive Neuroscience Treatment Research to Improve Cognition in Schizophrenia (CNTRICS) group as a useful domain for assessing cognitive deficits in patients with schizophrenia. Specific measures of contrast gain derived from recordings of steady-state visual evoked potentials (ssVEP) have demonstrated neural deficits within the visual pathways of patients with schizophrenia. Psychophysical measures of contrast sensitivity have also shown functional loss in these patients. In the current study, functional magnetic resonance imaging (fMRI) was used in conjunction with ssVEP and contrast sensitivity testing to elucidate the neural underpinnings of these deficits. During fMRI scanning, participants viewed 1) the same low and higher spatial frequency stimuli used in the psychophysical contrast sensitivity task, at both individual detection threshold contrast and at a high contrast; and 2) the same stimuli used in the ssVEP paradigm, which were designed to be biased toward either the magnocellular or parvocellular visual pathway. Patients showed significant impairment in contrast sensitivity at both spatial frequencies in the psychophysical task, but showed reduced occipital activation volume for low, but not higher, spatial frequency at the low and high contrasts tested in the magnet. As expected, patients exhibited selective deficits under the magnocellular-biased ssVEP condition. However, occipital lobe fMRI responses demonstrated the same general pattern for magnocellular- and parvocellular-biased stimuli across groups. These results indicate dissociation between the fMRI measures and the psychophysical/ssVEP measures. These latter measures appear to have greater value for the functional assessment of the contrast deficits explored here.
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Affiliation(s)
- Daniel J Calderone
- Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA.
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