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Totzek JF, Chakravarty MM, Joober R, Malla A, Shah JL, Raucher-Chéné D, Young AL, Hernaus D, Lepage M, Lavigne KM. Longitudinal inference of multiscale markers in psychosis: from hippocampal centrality to functional outcome. Mol Psychiatry 2024:10.1038/s41380-024-02549-x. [PMID: 38605172 DOI: 10.1038/s41380-024-02549-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 03/28/2024] [Accepted: 04/02/2024] [Indexed: 04/13/2024]
Abstract
Multiscale neuroscience conceptualizes mental illness as arising from aberrant interactions across and within multiple biopsychosocial scales. We leverage this framework to propose a multiscale disease progression model of psychosis, in which hippocampal-cortical dysconnectivity precedes impairments in episodic memory and social cognition, which lead to more severe negative symptoms and lower functional outcome. As psychosis represents a heterogeneous collection of biological and behavioral alterations that evolve over time, we further predict this disease progression for a subtype of the patient sample, with other patients showing normal-range performance on all variables. We sampled data from two cross-sectional datasets of first- and multi-episode psychosis, resulting in a sample of 163 patients and 119 non-clinical controls. To address our proposed disease progression model and evaluate potential heterogeneity, we applied a machine-learning algorithm, SuStaIn, to the patient data. SuStaIn uniquely integrates clustering and disease progression modeling and identified three patient subtypes. Subtype 0 showed normal-range performance on all variables. In comparison, Subtype 1 showed lower episodic memory, social cognition, functional outcome, and higher negative symptoms, while Subtype 2 showed lower hippocampal-cortical connectivity and episodic memory. Subtype 1 deteriorated from episodic memory to social cognition, negative symptoms, functional outcome to bilateral hippocampal-cortical dysconnectivity, while Subtype 2 deteriorated from bilateral hippocampal-cortical dysconnectivity to episodic memory and social cognition, functional outcome to negative symptoms. This first application of SuStaIn in a multiscale psychiatric model provides distinct disease trajectories of hippocampal-cortical connectivity, which might underlie the heterogeneous behavioral manifestations of psychosis.
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Affiliation(s)
- Jana F Totzek
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
- Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - M Mallar Chakravarty
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
- Department of Biological and Biomedical Engineering, McGill University, Montreal, QC, Canada
| | - Ridha Joober
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
| | - Ashok Malla
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
| | - Jai L Shah
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
| | - Delphine Raucher-Chéné
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
| | - Alexandra L Young
- Department of Computer Science, University College London, London, United Kingdom
| | - Dennis Hernaus
- Department of Psychiatry & Neuropsychology, School for Mental Health and NeuroScience MHeNS, Maastricht University, Maastricht, The Netherlands
| | - Martin Lepage
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Douglas Research Centre, Montreal, QC, Canada
| | - Katie M Lavigne
- Department of Psychiatry, McGill University, Montreal, QC, Canada.
- Douglas Research Centre, Montreal, QC, Canada.
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Zaher F, Diallo M, Achim AM, Joober R, Roy MA, Demers MF, Subramanian P, Lavigne KM, Lepage M, Gonzalez D, Zeljkovic I, Davis K, Mackinley M, Sabesan P, Lal S, Voppel A, Palaniyappan L. Speech markers to predict and prevent recurrent episodes of psychosis: A narrative overview and emerging opportunities. Schizophr Res 2024; 266:205-215. [PMID: 38428118 DOI: 10.1016/j.schres.2024.02.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 02/18/2024] [Accepted: 02/25/2024] [Indexed: 03/03/2024]
Abstract
Preventing relapse in schizophrenia improves long-term health outcomes. Repeated episodes of psychotic symptoms shape the trajectory of this illness and can be a detriment to functional recovery. Despite early intervention programs, high relapse rates persist, calling for alternative approaches in relapse prevention. Predicting imminent relapse at an individual level is critical for effective intervention. While clinical profiles are often used to foresee relapse, they lack the specificity and sensitivity needed for timely prediction. Here, we review the use of speech through Natural Language Processing (NLP) to predict a recurrent psychotic episode. Recent advancements in NLP of speech have shown the ability to detect linguistic markers related to thought disorder and other language disruptions within 2-4 weeks preceding a relapse. This approach has shown to be able to capture individual speech patterns, showing promise in its use as a prediction tool. We outline current developments in remote monitoring for psychotic relapses, discuss the challenges and limitations and present the speech-NLP based approach as an alternative to detect relapses with sufficient accuracy, construct validity and lead time to generate clinical actions towards prevention.
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Affiliation(s)
- Farida Zaher
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Mariama Diallo
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Amélie M Achim
- Département de Psychiatrie et Neurosciences, Université Laval, Québec City, QC, Canada; Vitam - Centre de Recherche en Santé Durable, Québec City, QC, Canada; Centre de Recherche CERVO, Québec City, QC, Canada
| | - Ridha Joober
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Marc-André Roy
- Département de Psychiatrie et Neurosciences, Université Laval, Québec City, QC, Canada; Centre de Recherche CERVO, Québec City, QC, Canada
| | - Marie-France Demers
- Centre de Recherche CERVO, Québec City, QC, Canada; Faculté de Pharmacie, Université Laval, Québec City, QC, Canada
| | - Priya Subramanian
- Department of Psychiatry, Schulich School of Medicine, Western University, London, ON, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Daniela Gonzalez
- Prevention and Early Intervention Program for Psychosis, London Health Sciences Center, Lawson Health Research Institute, London, ON, Canada
| | - Irnes Zeljkovic
- Department of Psychiatry, Schulich School of Medicine, Western University, London, ON, Canada
| | - Kristin Davis
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Michael Mackinley
- Department of Psychiatry, Schulich School of Medicine, Western University, London, ON, Canada; Prevention and Early Intervention Program for Psychosis, London Health Sciences Center, Lawson Health Research Institute, London, ON, Canada
| | - Priyadharshini Sabesan
- Lakeshore General Hospital and Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Shalini Lal
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, QC, Canada; School of Rehabilitation, Faculty of Medicine, University of Montréal, Montréal, QC, Canada
| | - Alban Voppel
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Lena Palaniyappan
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC, Canada; Department of Psychiatry, Schulich School of Medicine, Western University, London, ON, Canada; Robarts Research Institute, Western University, London, ON, Canada.
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Lavigne KM, Deng J, Raucher-Chéné D, Hotte-Meunier A, Voyer C, Sarraf L, Lepage M, Sauvé G. Transdiagnostic cognitive biases in psychiatric disorders: A systematic review and network meta-analysis. Prog Neuropsychopharmacol Biol Psychiatry 2024; 129:110894. [PMID: 37956787 DOI: 10.1016/j.pnpbp.2023.110894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 10/13/2023] [Accepted: 11/06/2023] [Indexed: 11/15/2023]
Abstract
Psychiatric disorders are characterized by cognitive deficits, which have been proposed as a transdiagnostic feature of psychopathology ("C" factor). Similarly, cognitive biases (e.g., in attention, memory, and interpretation) represent common tendencies in information processing that are often associated with psychiatric symptoms. However, the question remains whether cognitive biases are also transdiagnostic or are specific to certain psychiatric disorders/symptoms. The current systematic review sought to address whether the proposed "C" factor of transdiagnostic cognitive dysfunction in psychopathology can be extended to cognitive biases. Overall, 31 studies comprising 4401 participants (2536 patients, 1865 non-clinical controls) met inclusion criteria, assessing 19 cognitive biases across 20 diagnostic categories, with most studies focusing on interpretation (k = 22) and attention (k = 11) biases and only 2 assessing memory biases. Traditional meta-analyses found a moderate effect size (g = 0.32) for more severe cognitive biases in all patients relative to non-clinical controls, as well as small but significant associations between interpretation biases and transdiagnostic symptom categories (general psychopathology: r = 0.20, emotion dysfunction: r = 0.17, psychotic symptoms: r = 0.25). Network meta-analyses revealed significant patient versus non-clinical control differences on attention and interpretation biases across diagnoses, as well as significant differences between diagnoses, with highest severity in panic disorder for attention biases and obsessive-compulsive disorder for interpretation biases. The current findings extend the big "C" interpretation of transdiagnostic cognitive dysfunction in psychiatric disorders to cognitive biases and transdiagnostic symptom dimensions. Results also suggest that while the presence of cognitive biases is transdiagnostic, bias severity differs across diagnoses, as in traditional neurocognitive deficits.
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Affiliation(s)
- Katie M Lavigne
- Department of Psychiatry, McGill University, Montreal, QC, Canada; Douglas Research Centre, Montreal, QC, Canada.
| | | | - Delphine Raucher-Chéné
- Department of Psychiatry, McGill University, Montreal, QC, Canada; Douglas Research Centre, Montreal, QC, Canada
| | | | - Chloe Voyer
- Douglas Research Centre, Montreal, QC, Canada
| | - Lisa Sarraf
- Douglas Research Centre, Montreal, QC, Canada; Royal Ottawa Mental Health Centre, Ottawa, ON, Canada
| | - Martin Lepage
- Department of Psychiatry, McGill University, Montreal, QC, Canada; Douglas Research Centre, Montreal, QC, Canada
| | - Geneviève Sauvé
- Douglas Research Centre, Montreal, QC, Canada; Département d'éducation et pédagogie, Université de Québec à Montréal, Montréal, QC, Canada
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Belkacem A, Lavigne KM, Makowski C, Chakravarty M, Joober R, Malla A, Shah J, Lepage M. Effects of Anticholinergic Burden on Verbal Memory Performance in First-Episode Psychosis. Can J Psychiatry 2023; 68:894-903. [PMID: 37254533 PMCID: PMC10657580 DOI: 10.1177/07067437231179161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVES Antipsychotics are widely used to treat first-episode psychosis but may have an anticholinergic burden, that is, a cumulative effect of medications that block the cholinergic system. Studies suggest that a high anticholinergic burden negatively affects memory in psychosis, where cognitive deficits, particularly those in verbal memory, are a core feature of the disease. The present study sought to replicate this in a large cohort of well-characterized first-episode psychosis patients. We expected that patients in the highest anticholinergic burden group would exhibit the poorest verbal memory compared to those with low anticholinergic burden and healthy controls at baseline (3 months following admission). We further hypothesized that over time, at month 12, patients' verbal memory performance would improve but would remain inferior to controls. METHODS Patients (n = 311; low anticholinergic burden [n = 241] and high anticholinergic burden [n = 70], defined by a Drug Burden Index cut-off of 1) and healthy controls (n = 128) completed a clinical and neurocognitive battery including parts of the Wechsler Memory Scale at months 3 and 12. RESULTS Cross-sectionally, using an analysis of variance, patients in the highest anticholinergic burden group had the poorest performance in verbal memory when compared to the other groups at month 3, F(2,430) = 52.33, P < 0.001. Longitudinally, using a Generalized Estimating Equation model, the verbal memory performance of all groups improved over time. However, patients' performance overall remained poorer than the controls. CONCLUSION These findings highlight the importance of considering the anticholinergic burden when prescribing medications in the early stages of the disease.
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Affiliation(s)
- Agnès Belkacem
- Douglas Research Centre, McGill University, Montreal, Canada
| | - Katie M. Lavigne
- Douglas Research Centre, McGill University, Montreal, Canada
- Montreal Neurological Institute-Hospital, McGill University, Montreal, Canada
| | - Carolina Makowski
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | | | - Ridha Joober
- Douglas Research Centre, McGill University, Montreal, Canada
| | - Ashok Malla
- Douglas Research Centre, McGill University, Montreal, Canada
| | - Jai Shah
- Douglas Research Centre, McGill University, Montreal, Canada
| | - Martin Lepage
- Douglas Research Centre, McGill University, Montreal, Canada
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Ghanem J, Orri M, Moro L, Lavigne KM, Raucher-Chéné D, Malla A, Joober R, Lepage M. Exploring the Relationship Between Suicidality and Persistent Negative Symptoms Following a First Episode of Psychosis. Schizophr Bull 2023:sbad146. [PMID: 37847817 DOI: 10.1093/schbul/sbad146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
BACKGROUND AND HYPOTHESIS Suicide is a leading cause of death in first-episode psychosis (FEP), with an elevated risk during the first year following illness onset. The association between negative symptoms and suicidality remains contentious. Some studies suggest that negative symptoms may be associated with lower suicidality, while others fail to find an association between the two. No previous studies have specifically investigated suicidality in Persistent Negative Symptoms (PNS) and its associated subgroups. STUDY DESIGN In a large cohort of FEP patients (n = 515) from an early intervention service, we investigated suicidality in those with PNS, secondary PNS (ie, sPNS; PNS with clinical-level positive, depressive, or extrapyramidal symptoms), and non-PNS (all other patients) over 24 months. Patients were categorized into PNS groups based on symptoms from month 6 to month 12, and suicidality was evaluated using the Brief Psychiatric Rating Scale (BPRS). STUDY RESULTS Covarying for age and sex, we found that sPNS had higher suicidality relative to PNS and non-PNS throughout the 24-month period, but PNS and non-PNS did not differ. These differences were maintained after adjusting for depressive symptoms. CONCLUSION We observed that PNS did not significantly differ from non-PNS. However, we identified sPNS as a group with elevated suicidality above and beyond depression, suggesting that sPNS would benefit from targeted intervention and that PNS categorization identifies a subgroup for whom negative symptoms are not associated with lower suicidality.
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Affiliation(s)
- Joseph Ghanem
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychology, McGill University, Montreal, Canada
| | - Massimiliano Orri
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
| | - Laura Moro
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychology, Université de Montreal, Montreal, Canada
| | - Katie M Lavigne
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
- McGill Centre for Integrative Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Delphine Raucher-Chéné
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
| | - Ashok Malla
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
- Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Montreal, Canada
| | - Ridha Joober
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
- Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Montreal, Canada
| | - Martin Lepage
- DouglasMental Health University Institute, McGill University, Montreal, Canada
- Department of Psychology, McGill University, Montreal, Canada
- Department of Psychiatry, McGill University, Montreal, Canada
- Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Montreal, Canada
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Yang CC, Totzek JF, Lepage M, Lavigne KM. Sex differences in cognition and structural covariance-based morphometric connectivity: evidence from 28,000+ UK Biobank participants. Cereb Cortex 2023; 33:10341-10354. [PMID: 37557917 DOI: 10.1093/cercor/bhad286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 07/06/2023] [Accepted: 07/08/2023] [Indexed: 08/11/2023] Open
Abstract
There is robust evidence for sex differences in domain-specific cognition, where females typically show an advantage for verbal memory, whereas males tend to perform better in spatial memory. Sex differences in brain connectivity are well documented and may provide insight into these differences. In this study, we examined sex differences in cognition and structural covariance, as an index of morphometric connectivity, of a large healthy sample (n = 28,821) from the UK Biobank. Using T1-weighted magnetic resonance imaging scans and regional cortical thickness values, we applied jackknife bias estimation and graph theory to obtain subject-specific measures of structural covariance, hypothesizing that sex-related differences in brain network global efficiency, or overall covariance, would underlie cognitive differences. As predicted, females demonstrated better verbal memory and males showed a spatial memory advantage. Females also demonstrated faster processing speed, with no observed sex difference in executive functioning. Males showed higher global efficiency, as well as higher regional covariance (nodal strengths) in both hemispheres relative to females. Furthermore, higher global efficiency in males mediated sex differences in verbal memory and processing speed. Findings contribute to an improved understanding of how biological sex and differences in cognition are related to morphometric connectivity as derived from graph-theoretic methods.
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Affiliation(s)
- Crystal C Yang
- Department of Psychology, McGill University, Montréal, QC H4H 1R3, Canada
| | - Jana F Totzek
- Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, 6211 LK, Netherlands
- Department of Psychiatry, McGill University, Montréal, QC H4H 1R3, Canada
- Douglas Research Centre, Montréal, QC, H4H 1R3, Canada
| | - Martin Lepage
- Department of Psychology, McGill University, Montréal, QC H4H 1R3, Canada
- Department of Psychiatry, McGill University, Montréal, QC H4H 1R3, Canada
- Douglas Research Centre, Montréal, QC, H4H 1R3, Canada
| | - Katie M Lavigne
- Department of Psychiatry, McGill University, Montréal, QC H4H 1R3, Canada
- Douglas Research Centre, Montréal, QC, H4H 1R3, Canada
- Montreal Neurological Institute-Hospital, McGill University, Montréal, QC H4H 1R3, Canada
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Cheng J, Lavigne KM, Khangura J, Chinchani A, Rasheed M, Woodward BK, Zahid H, Zhao J, Balzan R, Ryder AG, Menon M, Woodward TS. Dimensions of beliefs without strong supporting evidence and reasons for holding them. Heliyon 2023; 9:e19833. [PMID: 37810078 PMCID: PMC10559198 DOI: 10.1016/j.heliyon.2023.e19833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 08/23/2023] [Accepted: 09/03/2023] [Indexed: 10/10/2023] Open
Abstract
Beliefs without strong supporting evidence (BWSSE) are commonplace, such as religious beliefs and conspiracy theories. The goals of the current study were to identify dimensions of BWSSE in the general public and study how reasons for holding each dimension depend on the strength of the belief. Participants completed a BWSSE questionnaire online, and principal component analysis suggested that the questionnaire captured 6 dimensions of beliefs that range in strength: New Age Spiritual, Traditional Spiritual, Nonconformist, Science, Mythical, and Conspiracy Theory. Mixed-model analyses of variance showed that while high-strength believers in both New Age and Traditional Spiritual shifted their reasons-for-belief away from 'just believe' and towards personal experience, only Traditional Spiritual shifted away from 'just believe' to culture. In contrast, for Conspiracy Theory and Mythical, the dominant reason for belief was media, but for Conspiracy Theory only, there was a shift from media to education/personal research for high-strength believers. This demonstrates that although spiritual beliefs are strengthened by personal experience, conspiracy theory beliefs are strengthened by information gathering. Understanding the source of an existing belief is important for debiasing attempts to move people towards beliefs with strong supporting evidence, including greater acceptance of evidence provided by experts, a likely requirement for negotiating global humanitarian emergencies in the not-so-distant future. Statement of Relevance. Beliefs without strong supporting evidence (BWSSE) have been gaining attention in mainstream society; particularly, the sources of information that may contribute to their formation and resistance to correction. Understanding the source of an existing belief is important for debiasing attempts to move people towards beliefs with strong supporting evidence, including greater acceptance of evidence provided by experts, a likely requirement for negotiating global humanitarian emergencies in the not-so-distant future.
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Affiliation(s)
- Judy Cheng
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Katie M. Lavigne
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Jessica Khangura
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
- BC Mental Health and Addictions Research Institute, Vancouver, BC, Canada
| | - Abhijit Chinchani
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
- Department of Bioinformatics, University of British Columbia, Vancouver, BC, Canada
- BC Mental Health and Addictions Research Institute, Vancouver, BC, Canada
| | - Maiya Rasheed
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada
| | - Bryan K.S. Woodward
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - Hafsa Zahid
- University of Toronto Department of Biomedical Engineering, Canada
| | - Jiaying Zhao
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
- Institute for Resources, Environment and Sustainability, University of British Columbia, Vancouver, BC, Canada
| | - Ryan Balzan
- College of Education, Psychology & Social Work, Flinders University, Adelaide, Australia
| | - Andrew G. Ryder
- Department of Psychology, University of Concordia, Montreal, QC, Canada
- Culture & Mental Health Research Unit, Jewish General Hospital, Montreal, QC, Canada
| | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
- Vancouver Coastal Health, Vancouver, BC, Canada
| | - Todd S. Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
- Department of Bioinformatics, University of British Columbia, Vancouver, BC, Canada
- BC Mental Health and Addictions Research Institute, Vancouver, BC, Canada
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Mendelson D, Mizrahi R, Lepage M, Lavigne KM. C-Reactive protein and cognition: Mediation analyses with brain morphology in the UK Biobank. Brain Behav Immun Health 2023; 31:100664. [PMID: 37484195 PMCID: PMC10362544 DOI: 10.1016/j.bbih.2023.100664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 05/26/2023] [Accepted: 06/28/2023] [Indexed: 07/25/2023] Open
Abstract
Cognitive impairments and abnormal immune activity are both associated with various clinical disorders. The association between C-Reactive protein (CRP), a marker associated with inflammation, and cognitive performance remains unclear. Further, mechanisms potentially linking CRP to cognition are not yet established. Brain structure may well mediate this relationship: immune processes play crucial roles in shaping and maintaining brain structure, with brain structure and function driving cognition. The United Kingdom Biobank (UKBB) is a large cohort study with extensive assessments, including high-sensitivity serum CRP levels, brain imaging, and various cognitive tasks. With data from 39,200 UKBB participants, we aimed first to determine the relationship between CRP and cognitive performance, and second, to assess metrics of brain morphology as potential mediators in this relationship. Participants were aged 40 to 70 at initial assessment and were mostly Caucasian. After accounting for potential covariates (e.g., age, sex, medical diagnoses, use of selective-serotonin reuptake inhibitors), we found CRP levels to have small, negative associations with fluid intelligence (b = -0.03, 95%CI[-0.05,-0.02], t(14381) = -3.62, pcor = .004), and numeric memory (b = -0.03, 95%CI[-0.05,-0.01], t(14366) = -3.31, pcor = .007). We found no evidence of brain morphology mediating these relationships (all |ab| < 0.001, all pcor > .55). Our findings from this large sample suggest that serum-assessed CRP is of marginal importance for cognitive performance in mid-to-late aged Caucasians; the small effect sizes of statistically significant associations provide context to previous inconsistent results. The seeming lack of involvement of brain morphology suggests that other brain metrics (e.g., connectivity, functional activation) may be more pertinent to this relationship. Future work should also consider CRP levels measured in the central nervous system and/or other cytokines that may better predict cognitive performance in this population.
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Affiliation(s)
- Daniel Mendelson
- Douglas Research Centre, 6875 Blvd. LaSalle, Verdun, Québec, H4H 1R3, Canada
- Department of Psychology, McGill University, 2001 McGill College Ave., Montréal, Québec, H3A 1G1, Canada
| | - Romina Mizrahi
- Douglas Research Centre, 6875 Blvd. LaSalle, Verdun, Québec, H4H 1R3, Canada
- Department of Psychiatry, McGill University, 1033 Pine Ave. West, Montréal, Québec, H3A 1A1, Canada
| | - Martin Lepage
- Douglas Research Centre, 6875 Blvd. LaSalle, Verdun, Québec, H4H 1R3, Canada
- Department of Psychiatry, McGill University, 1033 Pine Ave. West, Montréal, Québec, H3A 1A1, Canada
| | - Katie M. Lavigne
- Douglas Research Centre, 6875 Blvd. LaSalle, Verdun, Québec, H4H 1R3, Canada
- Department of Psychiatry, McGill University, 1033 Pine Ave. West, Montréal, Québec, H3A 1A1, Canada
- Montreal Neurological Institute-Hospital, 3801 University St., Montréal, Québec, H3A 2B4, Canada
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9
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Raucher-Chéné D, Pochiet G, Lavigne KM, Heinrichs RW, Malla A, Joober R, Lepage M. Normal-range verbal memory in the first-episode of psychosis: Clinical and functional outcomes across 24 months and impact of estimated verbal memory decrement. Schizophr Res 2022; 246:75-84. [PMID: 35728419 DOI: 10.1016/j.schres.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 05/18/2022] [Accepted: 06/11/2022] [Indexed: 11/16/2022]
Abstract
Verbal memory (VM) dysfunction is prevalent in first-episode psychosis (FEP) and has major impacts on long-term functional and clinical outcomes. Nevertheless, a substantial proportion of FEP patients have VM performance in the norm, called normal-range (NR) VM, and only a few studies have explored its relation to outcomes. Moreover, probable decrements between estimated premorbid and current cognitive performance could confuse the relationship between VM and clinical or functional outcomes in FEP patients. These potential interactions have not yet been considered in FEP, thus, we examined 1) the longitudinal relationship between VM performance (NR vs. below NR (BNR)) in FEP and clinical and functional outcomes over 24 months following admission to treatment, and 2) compared the clinical and functional status of NR patients with and without cognitive decrement at baseline and 12 months. A total of 271 patients (BNR = 114, NR = 157; 81 out of 105 NR with decrement) completed measures of psychosocial functioning and clinical symptoms at baseline, month 12, and month 24. Generalized Estimating Equations and unpaired t-tests were used to address the first and second aim, respectively. NR demonstrated better functioning and fewer negative symptoms when compared to BNR. Interestingly, NR patients with decrement reported significantly more negative symptoms at baseline compared to their counterparts without decrement. These findings document that a large proportion (57.9 %) of FEP patients have NR VM that appear to be functionally advantageous but that NR VM is nuanced by the presence or absence of a potential decrement early in the developmental course of the disorder.
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Affiliation(s)
- Delphine Raucher-Chéné
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France; Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France
| | - Gabrielle Pochiet
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Integrated Program in Neuroscience, Faculty of Medicine, McGill University, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Montreal Neurological Institute-Hospital, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | | | - Ashok Malla
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Prevention and Early Intervention Program for Psychoses (PEPP - Montreal), Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | - Ridha Joober
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Prevention and Early Intervention Program for Psychoses (PEPP - Montreal), Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Prevention and Early Intervention Program for Psychoses (PEPP - Montreal), Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada.
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10
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Raucher-Chéné D, Lavigne KM, Lepage M. Episodic Memory and Schizophrenia: From Characterization of Relational Memory Impairments to Neuroimaging Biomarkers. Curr Top Behav Neurosci 2022; 63:115-136. [PMID: 35902545 DOI: 10.1007/7854_2022_379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Episodic memory research in schizophrenia has a long history already which has clearly established significant impairments and strong associations with brain measures and functional outcome. The purpose of this chapter is not to make an exhaustive review of the recent literature but to highlight some relatively recent developments in the cognitive neuroscience field of episodic memory and schizophrenia. Hence, we present a contemporary view focusing specifically of relational memory which represents a form of episodic memory that refers to associations or binding among items or elements presented together. We describe the major tasks used and illustrate how their combination with brain imaging has: (1) favored the use of experimental memory tasks to isolate specific processes with specific neural correlates, (2) led to a distributed view of the neural correlates of memory impairments in schizophrenia where multiple regions are contributing, and (3) made possible the identification of fMRI biomarkers specific to episodic memory. We then briefly propose what we see as the next steps for memory research in schizophrenia so that the impact of this work can be maximized.
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Affiliation(s)
- Delphine Raucher-Chéné
- Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France.,Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France
| | - Katie M Lavigne
- Douglas Research Centre, Verdun, QC, Canada.,Department of Psychiatry, McGill University, Montréal, QC, Canada.,McGill Centre for Integrative Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Martin Lepage
- Douglas Research Centre, Verdun, QC, Canada. .,Department of Psychiatry, McGill University, Montréal, QC, Canada.
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11
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Lavigne KM, Raucher-Chéné D, Bodnar MD, Makowski C, Joober R, Malla A, Evans AC, Lepage M. Medial temporal lobe and basal ganglia volume trajectories in persistent negative symptoms following a first episode of psychosis. Prog Neuropsychopharmacol Biol Psychiatry 2022; 117:110551. [PMID: 35304154 DOI: 10.1016/j.pnpbp.2022.110551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/04/2022] [Accepted: 03/11/2022] [Indexed: 01/14/2023]
Abstract
BACKGROUND Persistent negative symptoms (PNS, e.g., avolition, anhedonia, alogia) are present in up to 30% of individuals diagnosed with a first episode of psychosis and greatly impact functional outcomes. PNS and secondary PNS (sPNS: concomitant with positive, depressive, or extrapyramidal symptoms) may index distinct pathophysiologies reflected by structural brain changes, particularly in the medial temporal lobe (MTL) and basal ganglia. AIMS We sought to characterize dynamic brain changes related to PNS over the course of 2 years following a first episode of psychosis. METHOD Longitudinal volumetric trajectories within the MTL (hippocampus, parahippocampal gyrus, entorhinal cortex, perirhinal cortex) and basal ganglia (caudate, putamen, pallidum) were investigated in 98 patients with first-episode psychosis and 86 healthy controls using generalized estimating equations. RESULTS In left hippocampus, PNS (n = 25 at baseline) showed decreased volumes over time, sPNS (n = 26) volumes remained stable, and non-PNS (n = 47) volumes increased over time to control levels. PNS-specific changes were observed in left hippocampus and left perirhinal cortex, with the greatest decline from 12 to 24 months to levels significantly below those of non-PNS and controls. Affective/non-affective diagnosis, antipsychotic medication dosage and adherence at baseline did not significantly impact these findings. Basal ganglia volume trajectories did not distinguish between PNS and sPNS. CONCLUSIONS The current study highlights distinct structural brain trajectories in PNS that are prominent in the left MTL. Basal ganglia alterations may contribute to PNS irrespective of their etiology. Left MTL volume reductions were most evident after 1 year of treatment, highlighting the importance of targeted early interventions.
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Affiliation(s)
- Katie M Lavigne
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada; McGill Centre for Integrative Neuroscience, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Delphine Raucher-Chéné
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada; Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France; Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France
| | | | - Carolina Makowski
- Department of Radiology, University of California San Diego, La Jolla, CA, United States of America
| | - Ridha Joober
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | - Ashok Malla
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | - Alan C Evans
- Department of Psychiatry, McGill University, Montreal, Canada; McGill Centre for Integrative Neuroscience, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada; Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Department of Biological and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada.
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12
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Raucher-Chéné D, Lavigne KM, Makowski C, Lepage M. Altered Surface Area Covariance in the Mentalizing Network in Schizophrenia: Insight Into Theory of Mind Processing. Biol Psychiatry Cogn Neurosci Neuroimaging 2022; 7:706-715. [PMID: 32919946 DOI: 10.1016/j.bpsc.2020.06.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Theory of mind (ToM), the cognitive capacity to attribute mental states to self and others, is robustly affected in schizophrenia. The neural substrates of ToM impairment have been largely studied with functional imaging, but little is known about structural abnormalities. We compared structural covariance (between-subjects correlations of brain regional measures) of magnetic resonance imaging-based cortical surface area between patients with schizophrenia and healthy control subjects and between schizophrenia subgroups based on the patients' ToM ability to examine ToM-specific effects on structural covariance in schizophrenia. METHODS T1-weighted structural images were acquired on a 3T magnetic resonance imaging scanner, and ToM was assessed with the Hinting Task for 104 patients with schizophrenia and 69 healthy control subjects. The sum of surface area was computed for 12 regions of interest selected and compared between groups to examine structural covariance within the often reported mentalizing network: rostral and caudal middle frontal gyrus, inferior parietal lobule, precuneus, and middle and superior temporal gyrus. High and low ToM groups were defined using a median split on the Hinting Task. RESULTS Cortical surface contraction was observed in the schizophrenia group, predominantly in temporoparietal regions. Patients with schizophrenia also exhibited significantly stronger covariance between the right rostral middle frontal gyrus and the right superior temporal gyrus than control subjects (r = 4.015; p < .001). Direct comparisons between high and low ToM subgroups revealed stronger contralateral frontotemporal covariances in the low ToM group. CONCLUSIONS Our results provide evidence for structural changes underlying ToM impairments in schizophrenia that need to be confirmed to develop new therapeutic perspectives.
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Affiliation(s)
- Delphine Raucher-Chéné
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; Cognition, Health, and Society Laboratory EA 6291, University of Reims Champagne-Ardenne, Reims, France; Academic Department of Psychiatry, University Hospital of Reims, Etablissement Public de Santé Mentale de la Marne, Reims, France
| | - Katie M Lavigne
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; McGill Centre for Integrative Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Carolina Makowski
- Center for Multimodal Imaging and Genetics, University of California, San Diego School of Medicine, La Jolla, California; Department of Radiology, University of California, San Diego School of Medicine, La Jolla, California
| | - Martin Lepage
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; Department of Psychiatry, McGill University, Montreal, Quebec, Canada.
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13
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Buck G, Makowski C, Chakravarty MM, Misic B, Joober R, Malla A, Lepage M, Lavigne KM. Sex-specific associations in verbal memory brain circuitry in early psychosis. J Psychiatr Res 2022; 151:411-418. [PMID: 35594601 DOI: 10.1016/j.jpsychires.2022.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/08/2022] [Accepted: 05/09/2022] [Indexed: 01/18/2023]
Abstract
Hippocampal circuitry and related cortical connections are altered in first episode psychosis (FEP) and are associated with verbal memory deficits, as well as positive and negative symptoms. There are robust sex differences in the clinical presentation of psychosis, including poorer verbal memory in male patients. Consideration of sex differences in hippocampal-cortical circuitry and their associations with different behavioral dimensions may be useful for understanding the underlying pathophysiology of verbal memory deficits and related symptomatology in psychosis. Here, we use a data-driven approach to simultaneously capture the complex links between sex, verbal memory, symptoms, and cortical-hippocampal brain metrics in FEP. Structural magnetic resonance imaging and behavioral data were acquired from 100 FEP patients (75 males, 25 females) and 87 controls (55 males, 32 females). Multivariate brain-behavior associations were examined in FEP using partial least squares to map sociodemographic, verbal memory, and clinical data onto brain morphometry. The analysis identified two sex-dependent patterns of verbal memory, symptoms, and brain structure. In male patients, verbal memory deficits and core psychotic symptoms were associated with both increased and decreased frontal and temporal cortical thickness and reductions in CA2/3 hippocampal subfield and fornix volumes. In female patients, fewer negative/depressive symptoms were associated with a more attenuated cortical thickness pattern and more diffuse reductions in hippocampal white matter regions. Taken together, the results contribute towards better understanding the underlying pathophysiology of psychosis by highlighting the unique contribution of specific hippocampal subfields and surrounding white matter and their connections with broader cortical networks in a sex-dependent manner.
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Affiliation(s)
- Gabriella Buck
- Douglas Mental Health University Institute, Montréal, Québec, Canada
| | - Carolina Makowski
- Department of Radiology, University of California San Diego, La Jolla, CA, United States
| | - M Mallar Chakravarty
- Douglas Mental Health University Institute, Montréal, Québec, Canada; Department of Psychiatry, McGill University, Montréal, Québec, Canada; Cerebral Imaging Centre, Douglas Mental Health University Institute, McGill University, Montréal, Canada; Department of Biological and Biomedical Engineering, McGill University, Montréal, Canada
| | - Bratislav Misic
- Montreal Neurological Institute, McGill University, Montréal, Québec, Canada; Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada; Department of Biological and Biomedical Engineering, McGill University, Montréal, Canada
| | - Ridha Joober
- Douglas Mental Health University Institute, Montréal, Québec, Canada; Department of Psychiatry, McGill University, Montréal, Québec, Canada
| | - Ashok Malla
- Douglas Mental Health University Institute, Montréal, Québec, Canada; Department of Psychiatry, McGill University, Montréal, Québec, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, Montréal, Québec, Canada; Department of Psychiatry, McGill University, Montréal, Québec, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, Montréal, Québec, Canada; Department of Psychiatry, McGill University, Montréal, Québec, Canada; Montreal Neurological Institute, McGill University, Montréal, Québec, Canada.
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14
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Mendelson D, Thibaudeau É, Sauvé G, Lavigne KM, Bowie CR, Menon M, Woodward TS, Lepage M, Raucher-Chéné D. Remote group therapies for cognitive health in schizophrenia-spectrum disorders: Feasible, acceptable, engaging. Schizophr Res Cogn 2022; 28:100230. [PMID: 35242604 PMCID: PMC8861418 DOI: 10.1016/j.scog.2021.100230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/29/2021] [Accepted: 11/29/2021] [Indexed: 10/27/2022]
Abstract
Severe cognitive impairments and cognitive distortions are core to schizophrenia-spectrum disorders (SSDs) and are associated with deteriorated social functioning. Despite well-established efficacy of group psychosocial therapies targeting cognitive health in SSDs, dissemination of these programs remains limited. Remote delivery offers a promising strategy for increasing the programs' accessibility. Yet, little research has evaluated group therapies for cognitive health delivered in this way. Thus, we aimed to assess, from participants' and therapists' perspectives, the feasibility, acceptability, as well as levels and process of engagement in a videoconference delivery of group psychosocial therapies for SSD patients' cognitive health. Participants, outpatients, attended Action Based Cognitive Remediation or Metacognitive Training, both adapted for videoconference. Then, participants and therapists completed post-therapy questionnaires. Of the 28 participants attending at least one session, 75% completed more than half of sessions and seven dropped out. Technology did not appear to significantly hinder participation in the programs. All completing participants reported a positive experience with therapy, 67% were not bothered by the distance from the therapist, and 77% trusted that the information shared was kept confidential. Therapist-rated levels of attention M = 7.5/9 (SD = 1.04), participation M = 6.91/9 (SD = 1.32), and social interactions M = 5.31/9 (SD = 1.96) were satisfactory. Nonetheless, participants indicated that they would have appreciated more social interactions with group members. These positive results validate the earliest stage in the implementation process for remote group therapies targeting cognitive health in SSDs. Remote delivery promises to improve access to therapies targeting cognitive health and, ultimately, facilitate functional recovery for SSD patients.
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Affiliation(s)
- Daniel Mendelson
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Department of Psychology, McGill University, Montréal, QC, Canada
| | - Élisabeth Thibaudeau
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Department of Psychiatry, McGill University, Montréal, QC, Canada
| | - Geneviève Sauvé
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Department of Education and Pedagogy, Université du Québec à Montréal, Montréal, QC, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Montreal Neurological Institute, Montréal, QC, Canada
| | | | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.,Vancouver Coastal Health, Vancouver, BC, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.,BC Mental Health and Addiction Research Institute, Vancouver, BC, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Department of Psychiatry, McGill University, Montréal, QC, Canada
| | - Delphine Raucher-Chéné
- Douglas Mental Health University Institute, Montréal, QC, Canada.,Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France.,Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France
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15
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Abstract
Schizophrenia and related psychoses are complex neuropsychiatric diseases representing dysconnectivity across multiple scales, through the micro (cellular), meso (brain network), manifest (behavioral), and social (interpersonal) levels. In vivo human neuroimaging, particularly at ultra-high field (UHF), offers unprecedented opportunity to examine multiscale dysconnectivity in psychosis. In this review, we provide an overview of the literature to date on UHF in psychosis, focusing on microscale findings from magnetic resonance spectroscopy (MRS), mesoscale studies on structural and functional magnetic resonance imaging (fMRI), and multiscale studies assessing multiple neuroimaging modalities and relating UHF findings to behavior. We highlight key insights and considerations from multiscale and longitudinal studies and provide recommendations for future research on UHF neuroimaging in psychosis.
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Affiliation(s)
- Katie M Lavigne
- Douglas Mental Health University Institute, McGill University, Montreal, QC, Canada.,Montreal Neurological Institute-Hospital, McGill University, Montreal, QC, Canada.,Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Kesavi Kanagasabai
- Robarts Research Institute, Western University, London, ON, Canada.,Department of Medical Biophysics, Western University, London, ON, Canada
| | - Lena Palaniyappan
- Douglas Mental Health University Institute, McGill University, Montreal, QC, Canada.,Department of Psychiatry, McGill University, Montreal, QC, Canada.,Robarts Research Institute, Western University, London, ON, Canada.,Department of Medical Biophysics, Western University, London, ON, Canada
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16
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Khalil M, Hollander P, Raucher-Chéné D, Lepage M, Lavigne KM. Structural brain correlates of cognitive function in schizophrenia: A meta-analysis. Neurosci Biobehav Rev 2021; 132:37-49. [PMID: 34822878 DOI: 10.1016/j.neubiorev.2021.11.034] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 11/18/2021] [Accepted: 11/21/2021] [Indexed: 12/20/2022]
Abstract
Schizophrenia is characterized by cognitive impairments and widespread structural brain abnormalities. Brain structure-cognition associations have been extensively studied in schizophrenia, typically involving individual cognitive domains or brain regions of interest. Findings in overlapping and diffuse brain regions may point to structural alterations in large-scale brain networks. We performed a systematic review and meta-analysis examining whether brain structure-cognition associations can be explained in terms of biologically meaningful brain networks. Of 7,261 screened articles, 88 were included in a series of meta-analyses assessing publication bias, heterogeneity, and study quality. Significant associations were found between overall brain structure and eight MATRICS-inspired cognitive domains. Brain structure mapped onto the seven Yeo functionally defined networks and extraneous structures (amygdala, hippocampus, and cerebellum) typically showed associations with conceptually related cognitive domains, with higher-level domains (e.g., executive function, social cognition) associated with more networks. These findings synthesize the extensive literature on brain structure and cognition in schizophrenia from a contemporary network neuroscience perspective and suggest that brain structure-cognition associations in schizophrenia may follow functional network architecture.
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Affiliation(s)
- Marianne Khalil
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada; Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Philippine Hollander
- Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, the Netherlands
| | - Delphine Raucher-Chéné
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada; Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France; Cognition, Health, and Society Laboratory (EA 6291), University of Reims, Champagne-Ardenne, Reims, France
| | - Martin Lepage
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada; Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Katie M Lavigne
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada; Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada; Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada.
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17
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Raucher-Chéné D, Thibaudeau E, Sauvé G, Lavigne KM, Lepage M. Understanding others as a mediator between verbal memory and negative symptoms in schizophrenia-spectrum disorder. J Psychiatr Res 2021; 143:429-435. [PMID: 34656875 DOI: 10.1016/j.jpsychires.2021.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 10/05/2021] [Accepted: 10/10/2021] [Indexed: 11/17/2022]
Abstract
From the onset of schizophrenia, verbal memory (VM) deficits and negative symptoms are strongly associated, and both additively predict functional outcomes. Emotion recognition (ER) and theory of mind (ToM; the ability to infer others' mental states), two components of social cognition, are also particularly affected in schizophrenia. Explanatory models of negative symptoms have integrated these cognitive impairments as potential precursors and previous studies revealed relationships between ER and/or ToM and VM, as well as with negative symptoms, but the organization of these associations remains unclear. We aimed to determine whether impairments in VM and social cognition sequentially pave the way for negative symptoms in schizophrenia. To this end, we used mediation analyses. One hundred and forty participants with a diagnosis of schizophrenia or schizoaffective disorder were recruited. First, correlational analyses were conducted between our variables of interest. The mediating effect of social cognition between VM and negative symptoms was then examined using the PROCESS macro. Variables of interest were significantly correlated (r = |0.166| to |0.391|), except for ER and negative symptoms. Only the serial multiple mediation model with 2 mediators (ER followed by ToM) revealed a significant indirect effect of VM on negative symptoms (β = - 0.160, 95% CI = -.370 to -.004). This relationship was selective for expressive negative symptoms (e.g., blunted affect and alogia). This study illustrates the richness of the relationship between cognitive deficits and negative symptoms and provides additional information for the involvement of social cognition in negative symptoms' etiology.
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Affiliation(s)
- Delphine Raucher-Chéné
- Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada; Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France; Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France
| | - Elisabeth Thibaudeau
- Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada; Department of Education and Pedagogy, Université du Québec À Montréal, Canada
| | - Geneviève Sauvé
- Douglas Mental Health University Institute, Montreal, Canada; Department of Education and Pedagogy, Université du Québec À Montréal, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada; McGill Centre for Integrative Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada.
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18
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Raucher-Chéné D, Bodnar M, Lavigne KM, Malla A, Joober R, Lepage M. Dynamic Interplay Between Insight and Persistent Negative Symptoms in First Episode of Psychosis: A Longitudinal Study. Schizophr Bull 2021; 48:211-219. [PMID: 34230974 PMCID: PMC8781342 DOI: 10.1093/schbul/sbab079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Persistent negative symptoms (PNS) are an important factor of first episode of psychosis (FEP) that present early on in the course of illness and have a major impact on long-term functional outcome. Lack of clinical insight is consistently associated with negative symptoms during the course of schizophrenia, yet only a few studies have explored its evolution in FEP. We sought to explore clinical insight change over a 24-month time period in relation to PNS in a large sample of FEP patients. Clinical insight was assessed in 515 FEP patients using the Scale to assess Unawareness of Mental Disorder. Data on awareness of illness, belief in response to medication, and belief in need for medication were analyzed. Patients were divided into 3 groups based on the presence of negative symptoms: idiopathic (PNS; n = 135), secondary (sPNS; n = 98), or absence (non-PNS; n = 282). Secondary PNS were those with PNS but also had clinically relevant levels of positive, depressive, or extrapyramidal symptoms. Our results revealed that insight improved during the first 2 months for all groups. Patients with PNS and sPNS displayed poorer insight across the 24-month period compared to the non-PNS group, but these 2 groups did not significantly differ. This large longitudinal study supported the strong relationship known to exist between poor insight and negative symptoms early in the course of the disorder and probes into potential factors that transcend the distinction between idiopathic and secondary negative symptoms.
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Affiliation(s)
- Delphine Raucher-Chéné
- Douglas Mental Health University Institute, McGill University, Montreal, Québec, Canada,Cognition, Health, and Society Laboratory (EA 6291), University of Reims Champagne-Ardenne, Reims, France,Academic Department of Psychiatry, University Hospital of Reims, EPSM Marne, Reims, France
| | - Michael Bodnar
- The Royal’s Institute of Mental Health Research, Ottawa, Ontario, Canada
| | - Katie M Lavigne
- Douglas Mental Health University Institute, McGill University, Montreal, Québec, Canada,McGill Centre for Integrative Neuroscience, Montreal Neurological Institute, McGill University, Montreal, Québec, Canada
| | - Ashok Malla
- Douglas Mental Health University Institute, McGill University, Montreal, Québec, Canada,Prevention and Early Intervention Program for Psychoses (PEPP-Montreal), Douglas Mental Health University Institute, Montreal, Québec, Canada,Department of Psychiatry, McGill University, Montreal, Québec, Canada
| | - Ridha Joober
- Douglas Mental Health University Institute, McGill University, Montreal, Québec, Canada,Prevention and Early Intervention Program for Psychoses (PEPP-Montreal), Douglas Mental Health University Institute, Montreal, Québec, Canada,Department of Psychiatry, McGill University, Montreal, Québec, Canada
| | - Martin Lepage
- Douglas Mental Health University Institute, McGill University, Montreal, Québec, Canada,Prevention and Early Intervention Program for Psychoses (PEPP-Montreal), Douglas Mental Health University Institute, Montreal, Québec, Canada,Department of Psychiatry, McGill University, Montreal, Québec, Canada,To whom correspondence should be addressed; Douglas Mental Health University Institute, Frank B Common Pavilion, F1143, 6875 LaSalle Blvd., Verdun, Quebec H4H 1R3, Canada; tel: (514) 761-6131 ext. 4393, fax: (514) 888-4064, e-mail:
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19
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Roes MM, Yin J, Taylor L, Metzak PD, Lavigne KM, Chinchani A, Tipper CM, Woodward TS. Hallucination-Specific structure-function associations in schizophrenia. Psychiatry Res Neuroimaging 2020; 305:111171. [PMID: 32916453 DOI: 10.1016/j.pscychresns.2020.111171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 08/15/2020] [Accepted: 08/19/2020] [Indexed: 01/13/2023]
Abstract
Combining structural (sMRI) and functional magnetic resonance imaging (fMRI) data in schizophrenia patients with and without auditory hallucinations (9 SZ_AVH, 12 SZ_nAVH), 18 patients with bipolar disorder, and 22 healthy controls, we examined whether cortical thinning was associated with abnormal activity in functional brain networks associated with auditory hallucinations. Language-task fMRI data were combined with mean cortical thickness values from 148 brain regions in a constrained principal component analysis (CPCA) to identify brain structure-function associations predictable from group differences. Two components emerged from the multimodal analysis. The "AVH component" highlighted an association of frontotemporal and cingulate thinning with altered brain activity characteristic of hallucinations among patients with AVH. In contrast, the "Bipolar component" distinguished bipolar patients from healthy controls and linked increased activity in the language network with cortical thinning in the left occipital-temporal lobe. Our findings add to a body of evidence of the biological underpinnings of hallucinations and illustrate a method for multimodal data analysis of structure-function associations in psychiatric illness.
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Affiliation(s)
- Meighen M Roes
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - John Yin
- BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Laura Taylor
- BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Paul D Metzak
- Department of Psychiatry, University of Calgary, Calgary, AB, Canada
| | - Katie M Lavigne
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Abhijit Chinchani
- BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Christine M Tipper
- BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Todd S Woodward
- BC Mental Health and Substance Use Services Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada; Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.
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20
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Sauvé G, Lavigne KM, Pochiet G, Brodeur MB, Lepage M. Efficacy of psychological interventions targeting cognitive biases in schizophrenia: A systematic review and meta-analysis. Clin Psychol Rev 2020; 78:101854. [DOI: 10.1016/j.cpr.2020.101854] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 04/01/2020] [Accepted: 04/04/2020] [Indexed: 12/14/2022]
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21
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Buck G, Lavigne KM, Makowski C, Joober R, Malla A, Lepage M. Sex Differences in Verbal Memory Predict Functioning Through Negative Symptoms in Early Psychosis. Schizophr Bull 2020; 46:1587-1595. [PMID: 32307536 PMCID: PMC7846137 DOI: 10.1093/schbul/sbaa054] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Verbal memory (VM) is one of the most affected cognitive domains in first-episode psychosis (FEP) and is a robust predictor of functioning. Given that healthy females demonstrate superior VM relative to males and that female patients show less-severe illness courses than male patients, this study examined whether normative sex differences in VM extend to FEP and influence functioning. Four hundred and thirty-five patients (299 males, 136 females) with affective or nonaffective psychosis were recruited from a catchment-based specialized FEP intervention service and 138 nonclinical controls (96 males, 42 females) were recruited from the same community. One of the two neurocognitive batteries comprising six cognitive domains (VM, visual memory, working memory, attention, executive function, processing speed) were administered at baseline. In patients, positive and negative symptoms were evaluated at baseline and functioning was assessed at 1-year follow-up. Patients were more impaired than controls on all cognitive domains, but only VM showed sex differences (both patient and control males performed worse than females), and these results were consistent across batteries. In patients, better baseline VM in females was related to better functioning after 1 year, mediated through fewer baseline negative symptoms. Supplemental analyses revealed these results were not driven by affective psychosis nor by age and parental education. Thus, normative sex differences in VM are preserved in FEP and mediate functioning at 1-year follow-up via negative symptoms. This study highlights the importance of investigating sex effects for understanding VM deficits in early psychosis and suggests that sex may be a disease-modifying variable with important treatment implications.
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Affiliation(s)
- Gabriella Buck
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Katie M Lavigne
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | | | - Ridha Joober
- Department of Psychiatry, McGill University, Montreal, QC, Canada,Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Verdun, QC, Canada
| | - Ashok Malla
- Department of Psychiatry, McGill University, Montreal, QC, Canada,Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Verdun, QC, Canada
| | - Martin Lepage
- Department of Psychiatry, McGill University, Montreal, QC, Canada,Prevention and Early Intervention Program for Psychosis, Douglas Mental Health University Institute, Verdun, QC, Canada,To whom correspondence should be addressed; Martin Lepage, Douglas Mental Health University Institute, Verdun, QC, Canada H4H 1R3; tel: +1-514-761-6131 ext. 4393, fax: +1-514-888-4064, e-mail:
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22
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Lavigne KM, Menon M, Moritz S, Woodward TS. Functional brain networks underlying evidence integration and delusional ideation. Schizophr Res 2020; 216:302-309. [PMID: 31839549 DOI: 10.1016/j.schres.2019.11.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 11/07/2019] [Accepted: 11/22/2019] [Indexed: 12/26/2022]
Abstract
Cognitive biases affecting evidence integration contribute to delusions and delusional ideation in the psychosis continuum. In previously published work we observed hyperactivity in a visual attention network (VsAN) during confirmatory evidence integration, and hypoactivity in a cognitive evaluation network (CEN) during disconfirmatory evidence integration in schizophrenia patients with delusions, suggesting that a task-specific imbalance of these networks may contribute to delusion maintenance. In the current study, we investigated whether patterns of aberrant functional connectivity observed in past work were associated with delusional ideation in 41 healthy individuals by examining associations between cognitive biases, subclinical schizotypal traits, and functional brain activity during evidence integration. Behaviourally, we replicated positive associations between schizotypal traits and cognitive biases and further showed that this association was driven by delusional ideation specifically. Constrained principal component analysis for fMRI (fMRI-CPCA) revealed recruitment of the brain networks observed in our previous clinical and non-clinical evidence integration studies: default-mode network (DMN); cognitive evaluation network (CEN); and visual attention (VsAN) network. Moreover, as with clinically-significant delusions, delusional ideation was associated with decreased CEN activity during the processing of disconfirmatory evidence and increased VsAN activity during the processing of confirmatory evidence. These findings suggest that this altered pattern of activation across networks during evidence integration may underlie delusional ideation and delusions in the psychosis continuum.
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Affiliation(s)
- Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Vancouver, BC, Canada
| | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Steffen Moritz
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Vancouver, BC, Canada.
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23
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Abstract
Integrating evidence that contradicts a belief is a fundamental aspect of belief revision and is closely linked to delusions in schizophrenia. In a previous functional magnetic resonance imaging (fMRI) study on healthy individuals, we identified functional brain networks underlying evidence integration as visual attention network (VsAN; dorsal anterior cingulate cortex, insula, occipital regions), default-mode network (DMN), and cognitive evaluation network (CEN; orbitofrontal cortex, inferior frontal gyrus, parietal cortex). In the current clinical fMRI study, we compared network-based activity during evidence integration between healthy controls (n = 41), nondelusional (n = 37), and delusional (n = 33) patients with schizophrenia, and related this activity to cognitive processing involved in evidence integration measured outside the scanner. Task-induced coordinated activation was measured using group-constrained principal component analysis for fMRI. Increased VsAN activation, reduced DMN deactivation, and reduced CEN activation were observed for schizophrenia, with this pattern being most pronounced for the delusional group. Importantly, poor evidence integration comprehensively measured outside the scanner was significantly associated with increased VsAN activation and reduced DMN deactivation when processing confirmatory evidence, and with reduced CEN activation when processing disconfirmatory evidence. This is the first comprehensive study of the functional brain networks associated with evidence integration in schizophrenia and highlights how an imbalance of functional brain networks responding to confirmatory and disconfirmatory evidence may underlie delusions in schizophrenia.
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Affiliation(s)
- Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada,To whom correspondence should be addressed; BC Children's Hospital Research Institute, Translational Research Building, Room A3-A117, 3rd Floor, 938 West 28th Avenue, Vancouver, BC V5Z 4H4, Canada; tel: 604-875-2000 x 4724, fax: 604-875-3871,
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24
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Lavigne KM, Woodward TS. Hallucination- and speech-specific hypercoupling in frontotemporal auditory and language networks in schizophrenia using combined task-based fMRI data: An fBIRN study. Hum Brain Mapp 2017; 39:1582-1595. [PMID: 29271110 DOI: 10.1002/hbm.23934] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/26/2017] [Accepted: 11/08/2017] [Indexed: 01/23/2023] Open
Abstract
Hypercoupling of activity in speech-perception-specific brain networks has been proposed to play a role in the generation of auditory-verbal hallucinations (AVHs) in schizophrenia; however, it is unclear whether this hypercoupling extends to nonverbal auditory perception. We investigated this by comparing schizophrenia patients with and without AVHs, and healthy controls, on task-based functional magnetic resonance imaging (fMRI) data combining verbal speech perception (SP), inner verbal thought generation (VTG), and nonverbal auditory oddball detection (AO). Data from two previously published fMRI studies were simultaneously analyzed using group constrained principal component analysis for fMRI (group fMRI-CPCA), which allowed for comparison of task-related functional brain networks across groups and tasks while holding the brain networks under study constant, leading to determination of the degree to which networks are common to verbal and nonverbal perception conditions, and which show coordinated hyperactivity in hallucinations. Three functional brain networks emerged: (a) auditory-motor, (b) language processing, and (c) default-mode (DMN) networks. Combining the AO and sentence tasks allowed the auditory-motor and language networks to separately emerge, whereas they were aggregated when individual tasks were analyzed. AVH patients showed greater coordinated activity (deactivity for DMN regions) than non-AVH patients during SP in all networks, but this did not extend to VTG or AO. This suggests that the hypercoupling in AVH patients in speech-perception-related brain networks is specific to perceived speech, and does not extend to perceived nonspeech or inner verbal thought generation.
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Affiliation(s)
- Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Vancouver, British Columbia, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Vancouver, British Columbia, Canada
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25
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Larivière S, Lavigne KM, Woodward TS, Gerretsen P, Graff-Guerrero A, Menon M. Altered functional connectivity in brain networks underlying self-referential processing in delusions of reference in schizophrenia. Psychiatry Res Neuroimaging 2017; 263:32-43. [PMID: 28315577 DOI: 10.1016/j.pscychresns.2017.03.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 11/19/2022]
Abstract
Delusions of reference in schizophrenia are thought to result from misattributions of self-relevance to neutral events. Activation of regions within the cortical midline structures (CMS; e.g., medial prefrontal cortex, cingulate cortex, and precuneus) have been previously associated with self-referential processing in schizophrenia patients; however, the specificity of this pattern to individuals with current delusions of reference has yet to be determined. In the present study, we identified functional brain networks that underlie self-referential processing using task-based multivariate functional connectivity. Healthy control subjects (n=15) and schizophrenia patients with (n=14) and without (n=13) current delusions of reference were shown ambiguous statements while undergoing functional magnetic resonance imaging, and evaluated whether these statements were thought to be specifically about them. Our results revealed two functionally distinct CMS networks that differed between patients and controls during self-referential processing: a posterior CMS network, which showed muted deactivity in non-delusional patients; and an anterior CMS network, in which delusional patients demonstrated hyperactivity. Furthermore, activity within the anterior CMS network across the three groups showed a linear pattern of increasing activity associated with greater intensity of delusions of reference, suggesting that hyperactivity in this network may underlie delusions of reference.
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Affiliation(s)
- Sara Larivière
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Philip Gerretsen
- Multimodal Imaging Group - Research Imaging Centre and Geriatric Mental Health Division, Centre for Addiction and Mental Health, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada
| | - Ariel Graff-Guerrero
- Multimodal Imaging Group - Research Imaging Centre and Geriatric Mental Health Division, Centre for Addiction and Mental Health, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada
| | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada.
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26
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Bodnar TS, Taves MD, Lavigne KM, Woodward TS, Soma KK, Weinberg J. Differential activation of endocrine-immune networks by arthritis challenge: Insights from colony-specific responses. Sci Rep 2017; 7:698. [PMID: 28386080 PMCID: PMC5428775 DOI: 10.1038/s41598-017-00652-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 03/08/2017] [Indexed: 11/14/2022] Open
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory condition with variable clinical presentation and disease progression. Importantly, animal models of RA are widely used to examine disease pathophysiology/treatments. Here, we exploited known vendor colony-based differences in endocrine/immune responses to gain insight into inflammatory modulators in arthritis, utilizing the adjuvant-induced arthritis (AA) model. Our previous study found that Sprague-Dawley (SD) rats from Harlan develop more severe AA, have lower corticosteroid binding globulin, and have different patterns of cytokine activation in the hind paw, compared to SD rats from Charles River. Here, we extend these findings, demonstrating that Harlan rats show reduced hypothalamic cytokine responses to AA, compared to Charles River rats, and identify colony-based differences in cytokine profiles in hippocampus and spleen. To go beyond individual measures, probing for networks of variables underlying differential responses, we combined datasets from this and the previous study and performed constrained principal component analysis (CPCA). CPCA revealed that with AA, Charles River rats show activation of chemokine and central cytokine networks, whereas Harlan rats activate peripheral immune/hypothalamic-pituitary-adrenal networks. These data suggest differential underlying disease mechanism(s), highlighting the power of evaluating multiple disease biomarkers, with potential implications for understanding differential disease profiles in individuals with RA.
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Affiliation(s)
- Tamara S Bodnar
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, Canada.
| | - Matthew D Taves
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada.,Department of Zoology, University of British Columbia, Vancouver, BC, Canada
| | - Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada.,Translational Research Unit, BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Kiran K Soma
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada.,Department of Zoology, University of British Columbia, Vancouver, BC, Canada.,Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada.,Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Joanne Weinberg
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, Canada.,Department of Psychology, University of British Columbia, Vancouver, BC, Canada.,Graduate Program in Neuroscience, University of British Columbia, Vancouver, BC, Canada
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27
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Lavigne KM, Menon M, Woodward TS. Impairment in subcortical suppression in schizophrenia: Evidence from the fBIRN Oddball Task. Hum Brain Mapp 2016; 37:4640-4653. [PMID: 27477494 DOI: 10.1002/hbm.23334] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 07/20/2016] [Accepted: 07/22/2016] [Indexed: 12/28/2022] Open
Abstract
Schizophrenia patients show widespread impairments in brain activity during oddball tasks, which involve responding to infrequent target stimuli while refraining from responding during continuous non-target stimuli. In a network-based investigation comparing schizophrenia or schizoaffective patients to healthy controls, we sought to clarify which networks were specifically associated with target detection using a multivariate analysis technique that identifies task-specific functional brain networks. We acquired data from the publicly available function biomedical informatics research network collaboration, including 58 patients and 50 controls. Two task-based functional brain networks were identified: (1) a response modulation network including bilateral temporal pole, supramarginal gyrus, striatum, and thalamus, on which patients showed decreased activity relative to controls; and (2) an auditory-motor response activation network, on which patients showed a slower return to baseline than controls, but no difference in peak activation. For both groups, baseline to peak activation of the response modulation network correlated negatively with peak to baseline activity in the response activation network, suggesting a role in suppressing the motor response following targets. Patients' impaired activity in the response modulation network, and subsequent longer return to baseline in the response activation network, correspond with their later and less accurate behavioral performance, suggesting that impairment in suppression of the auditory-motor response activation network could underlie oddball task deficits in schizophrenia. In addition, the magnitude of the activity in the response modulation network was correlated with intensity of delusions of reference, supporting the notion that increased referential ideation is associated with hyperactivity within the subcortical striatal-limbic network. Hum Brain Mapp 37:4640-4653, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, British Colombia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Colombia, Canada
| | - Mahesh Menon
- Department of Psychiatry, University of British Columbia, Vancouver, British Colombia, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, British Colombia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Colombia, Canada
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28
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Woodward TS, Leong K, Sanford N, Tipper CM, Lavigne KM. Altered balance of functional brain networks in Schizophrenia. Psychiatry Res Neuroimaging 2016; 248:94-104. [PMID: 26786152 DOI: 10.1016/j.pscychresns.2016.01.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 11/17/2015] [Accepted: 01/03/2016] [Indexed: 11/18/2022]
Abstract
Activity in dorsal attention (DAN) and frontoparietal (FPN) functional brain networks is linked to allocation of attention to external stimuli, and activity in the default-mode network (DMN) is linked to allocation of attention to internal representations. Tasks requiring attention to external stimuli shift activity to the DAN/FPN and away from the DMN, and optimal task performance depends on balancing DAN/FPN against DMN activity. The current functional magnetic resonance imaging (fMRI) study assessed the balance of DAN/FPN and DMN activity in 13 schizophrenia patients and 13 healthy controls while they were engaged in a task switching Stroop paradigm which demanded internally directed attention to task instructions. The typical pattern of reciprocity between the DAN/FPN and DMN was observed for healthy controls but not for patients, suggesting a reduction in the internally focussed thought important for maintenance of instructions and strategies in schizophrenia. The observed alteration in the balance between DAN/FPN and DMN in patients may reflect a general mechanism underlying multiple forms of cognitive impairment in schizophrenia, including global processing deficits such as cognitive inefficiency and impaired context processing.
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Affiliation(s)
- Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada.
| | - KaWai Leong
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada
| | - Nicole Sanford
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Christine M Tipper
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
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29
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Woodward TS, Tipper CM, Leung AL, Lavigne KM, Sanford N, Metzak PD. Reduced functional connectivity during controlled semantic integration in schizophrenia: A multivariate approach. Hum Brain Mapp 2015; 36:2948-64. [PMID: 26014890 DOI: 10.1002/hbm.22820] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 03/26/2015] [Accepted: 04/13/2015] [Indexed: 11/10/2022] Open
Abstract
Impairment in controlled semantic association is a central feature of schizophrenia, and the goal of the current functional magnetic resonance imaging study was to identify the neural correlates of this impairment. Thirty people with schizophrenia and 30 healthy age- and gender-matched control subjects performed a task requiring participants to match word pairs that varied in semantic distance (distant vs. close). A whole-brain multivariate connectivity analysis revealed three functional brain networks of primary interest engaged by the task: two configurations of a multiple demands network, in which brain activity did not differ between groups, and a semantic integration network, in which coordinated activity was reduced in schizophrenia patients relative to healthy controls, for distantly relative to closely related word pairs. The hypoactivity during controlled semantic integration in schizophrenia reported here, combined with hyperactivity in automatic semantic association reported in the literature, suggests an imbalance between controlled integration and automatic association. This provides a biological basis for Bleuler's concept of schizophrenia as a "split mind" arising from an impaired ability to form coherent associations between semantic concepts.
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Affiliation(s)
- Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
| | - Christine M Tipper
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
| | - Alexander L Leung
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
| | - Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
| | - Nicole Sanford
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
| | - Paul D Metzak
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada.,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, British Columbia, Canada
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30
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Metzak PD, Lavigne KM, Woodward TS. Functional brain networks involved in reality monitoring. Neuropsychologia 2015; 75:50-60. [PMID: 26004062 DOI: 10.1016/j.neuropsychologia.2015.05.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 05/16/2015] [Accepted: 05/20/2015] [Indexed: 11/26/2022]
Abstract
Source monitoring refers to the recollection of variables that specify the context and conditions in which a memory episode was encoded. This process involves using the qualitative and quantitative features of a memory trace to distinguish its source. One specific class of source monitoring is reality monitoring, which involves distinguishing internally generated from externally generated information, that is, memories of imagined events from real events. The purpose of the present study was to identify functional brain networks that underlie reality monitoring, using an alternative type of source monitoring as a control condition. On the basis of previous studies on self-referential thinking, it was expected that a medial prefrontal cortex (mPFC) based network would be more active during reality monitoring than the control condition, due to the requirement to focus on a comparison of internal (self) and external (other) source information. Two functional brain networks emerged from this analysis, one reflecting increasing task-related activity, and one reflecting decreasing task-related activity. The second network was mPFC based, and was characterized by task-related deactivations in areas resembling the default-mode network; namely, the mPFC, middle temporal gyri, lateral parietal regions, and the precuneus, and these deactivations were diminished during reality monitoring relative to source monitoring, resulting in higher activity during reality monitoring. This result supports previous research suggesting that self-referential thinking involves the mPFC, but extends this to a network-level interpretation of reality monitoring.
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Affiliation(s)
- Paul D Metzak
- Department of Psychiatry, University of British Columbia, Vancouver, Canada; BC Mental Health and Addiction Research Institute, Vancouver, Canada
| | - Katie M Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, Canada; BC Mental Health and Addiction Research Institute, Vancouver, Canada
| | - Todd S Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, Canada; BC Mental Health and Addiction Research Institute, Vancouver, Canada.
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Lavigne KM, Metzak PD, Woodward TS. Functional brain networks underlying detection and integration of disconfirmatory evidence. Neuroimage 2015; 112:138-151. [DOI: 10.1016/j.neuroimage.2015.02.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/11/2015] [Accepted: 02/20/2015] [Indexed: 11/26/2022] Open
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Lavigne KM, Rapin LA, Metzak PD, Whitman JC, Jung K, Dohen M, Lœvenbruck H, Woodward TS. Left-dominant temporal-frontal hypercoupling in schizophrenia patients with hallucinations during speech perception. Schizophr Bull 2015; 41:259-67. [PMID: 24553150 PMCID: PMC4266284 DOI: 10.1093/schbul/sbu004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Task-based functional neuroimaging studies of schizophrenia have not yet replicated the increased coordinated hyperactivity in speech-related brain regions that is reported with symptom-capture and resting-state studies of hallucinations. This may be due to suboptimal selection of cognitive tasks. METHODS In the current study, we used a task that allowed experimental manipulation of control over verbal material and compared brain activity between 23 schizophrenia patients (10 hallucinators, 13 nonhallucinators), 22 psychiatric (bipolar), and 27 healthy controls. Two conditions were presented, one involving inner verbal thought (in which control over verbal material was required) and another involving speech perception (SP; in which control verbal material was not required). RESULTS A functional connectivity analysis resulted in a left-dominant temporal-frontal network that included speech-related auditory and motor regions and showed hypercoupling in past-week hallucinating schizophrenia patients (relative to nonhallucinating patients) during SP only. CONCLUSIONS These findings replicate our previous work showing generalized speech-related functional network hypercoupling in schizophrenia during inner verbal thought and SP, but extend them by suggesting that hypercoupling is related to past-week hallucination severity scores during SP only, when control over verbal material is not required. This result opens the possibility that practicing control over inner verbal thought processes may decrease the likelihood or severity of hallucinations.
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Affiliation(s)
- Katie M. Lavigne
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada;,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Lucile A. Rapin
- Department of Linguistics, Université du Québec à Montréal, Montréal, QC, Canada
| | - Paul D. Metzak
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada;,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Jennifer C. Whitman
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada;,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Kwanghee Jung
- Department of Pediatrics, University of Texas Health Science Center, Houston, TX
| | - Marion Dohen
- Speech and Cognition Department, Grenoble University, Grenoble, France
| | | | - Todd S. Woodward
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada;,BC Mental Health and Addictions Research Institute, Provincial Health Services Authority, Vancouver, BC, Canada;,*To whom correspondence should be addressed; BC Mental Health and Addictions Research Institute, Room 117, 3rd Floor, 938 West 28th Avenue, Vancouver, BC V5Z 4H4, Canada; tel: 604-875-2000 x 4724, fax: 604-875-3871, e-mail:
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Raineki C, Hellemans KGC, Bodnar T, Lavigne KM, Ellis L, Woodward TS, Weinberg J. Neurocircuitry underlying stress and emotional regulation in animals prenatally exposed to alcohol and subjected to chronic mild stress in adulthood. Front Endocrinol (Lausanne) 2014; 5:5. [PMID: 24592255 PMCID: PMC3923299 DOI: 10.3389/fendo.2014.00005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/10/2014] [Indexed: 12/23/2022] Open
Abstract
Individuals exposed to alcohol during gestation show higher rates of psychopathologies. The hyperresponsivity to stress induced by prenatal alcohol exposure (PAE) may be related to this increased rate of psychopathologies, especially because this population is more likely to be exposed to stressful environments throughout life. However, alcohol-induced changes in the overlapping neurocircuitries that underlie stress and the expression of psychopathologies are not fully understood. Here, we performed a comprehensive analysis of the neural activity within central areas known to play key roles in both emotional and stress regulation. Adult male and female offspring from PAE, pair-fed, and ad libitum-fed control conditions were exposed to chronic mild stress (CMS). Following CMS, the neural activity (c-fos mRNA) of the amygdala, ventral hippocampal formation, medial prefrontal cortex (mPFC), and paraventricular nucleus of hypothalamus (PVN) was assessed in response to an acute stress (elevated plus maze). Our results demonstrate that, overall, PAE decreased neural activity within the amygdala and hippocampal formation in males and increased neural activity within the amygdala and mPFC in females. CMS reduced neural activity within the mPFC and PVN in PAE males, but reduced activity in all areas analyzed in control males. By contrast, CMS reduced neural activity in the mPFC in PAE females and had no effects in control females. Furthermore, the constrained principal component analysis revealed that these patterns of neural activity resulted in differential activation of the functional neural networks in males compared to females, indicating sexually dimorphic effects of PAE and CMS. Importantly, the altered networks of brain activation in PAE animals may underlie the hyperresponsivity to stress and increased psychopathologies observed among individuals prenatally exposed to alcohol.
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Affiliation(s)
- Charlis Raineki
- Department of Cellular and Physiological Sciences, The University of British Columbia, Vancouver, BC, Canada
| | - Kim G. C. Hellemans
- Department of Cellular and Physiological Sciences, The University of British Columbia, Vancouver, BC, Canada
- Department of Neuroscience, Carleton University, Ottawa, ON, Canada
| | - Tamara Bodnar
- Department of Cellular and Physiological Sciences, The University of British Columbia, Vancouver, BC, Canada
| | - Katie M. Lavigne
- Department of Psychiatry, The University of British Columbia, Vancouver, BC, Canada
- BC Mental Health and Addictions Research Institute (BCMHARI), Vancouver, BC, Canada
| | - Linda Ellis
- Department of Cellular and Physiological Sciences, The University of British Columbia, Vancouver, BC, Canada
| | - Todd S. Woodward
- Department of Psychiatry, The University of British Columbia, Vancouver, BC, Canada
- BC Mental Health and Addictions Research Institute (BCMHARI), Vancouver, BC, Canada
| | - Joanne Weinberg
- Department of Cellular and Physiological Sciences, The University of British Columbia, Vancouver, BC, Canada
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Lavigne KM, Hofman S, Ring AJ, Ryder AG, Woodward TS. The personality of meaning in life: Associations between dimensions of life meaning and the Big Five. The Journal of Positive Psychology 2013. [DOI: 10.1080/17439760.2012.736527] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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