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Lepock JR, Sanches M, Ahmed S, Gerritsen CJ, Korostil M, Mizrahi R, Kiang M. N400 event-related brain potential index of semantic processing and two-year clinical outcomes in persons at high risk for psychosis: A longitudinal study. Eur J Neurosci 2024; 59:1877-1888. [PMID: 37386749 DOI: 10.1111/ejn.16074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 05/24/2023] [Accepted: 06/13/2023] [Indexed: 07/01/2023]
Abstract
The N400 event-related brain potential (ERP) semantic priming effect reflects greater activation of contextually related versus unrelated concepts in long-term semantic memory. Deficits in this measure have been found in persons with schizophrenia and those at clinical high risk (CHR) for this disorder. In CHR patients, we previously found that these deficits predict poorer social functional outcomes after 1 year. In the present study, we tested whether these deficits predicted greater psychosis-spectrum symptom severity and functional impairment over 2 years. We measured N400 semantic priming effects at baseline in CHR patients (n = 47) who viewed prime words each followed by a related/unrelated target word at stimulus-onset asynchronies (SOAs) of 300 or 750 ms. We measured psychosis-spectrum symptoms using the Structured Interview for Prodromal Symptoms and role and social functioning with the Global Functioning: Role and Social scales, at baseline, 1 (n = 29) and 2 years (n = 25). There was a significant interaction between the N400 semantic priming effect at the 300-ms SOA and time on GF:Role scores, indicating that, contrary to expectations, smaller baseline N400 semantic priming effects were associated with more improvement in role functioning from baseline to Year 1, but baseline N400 priming effects did not predict role functioning at Year 2. N400 priming effects were not significantly associated with different trajectories in psychosis-spectrum symptoms or social functioning. Thus, CHR patients' N400 semantic priming effects did not predict clinical outcomes over 2 years, suggesting that this ERP measure may have greater value as a state or short-term prognostic neurophysiological biomarker.
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Affiliation(s)
| | - Marcos Sanches
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Sarah Ahmed
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Cory J Gerritsen
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Michele Korostil
- Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada
- St. Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Romina Mizrahi
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Michael Kiang
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
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Lucarini V, Kazes M, Krebs E, Morin V, Godignon M, De Gasquet M, Ton T, Féron M, Tanguy G, Lévi A, Bellot C, Willard D, Auther AM, Cornblatt B, Bralet MC, Krebs MO. Validation of the French version of the Global Functioning: Social and Global Functioning: Role Scales in adolescents and young adults seeking help in early intervention clinics. Early Interv Psychiatry 2024; 18:3-9. [PMID: 37037927 DOI: 10.1111/eip.13427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/28/2023] [Indexed: 04/12/2023]
Abstract
AIM Social and role functioning impairments characterize patients along the schizophrenia spectrum, but the existing evaluations tools do not specifically address younger population issues. The Global Functioning Social (GF:S) and Global Functioning Role (GF:R) scales have been specifically designed for that purpose. The aim of this study is to establish the reliability and concurrent validity of the French version of GF:S and GF:R scales. METHODS The two scales GF: Social (GF:S) and Role (GF:R) have first been translated into French and independently back translated and validated by the original authors. Between March 2021 and March 2022, we enrolled 51 participants (20.3 ± 3.7 years old; female = 22/51) amongst help-seekers referring to two different early mental health services in the Île-de-France. In an ecological design, participants met different diagnoses, 7 (13.7%) met the criteria for Ultra-High Risk of psychosis (UHR) using CAARMS criteria. RESULTS Inter-rater reliability was excellent for scores related to the past month and to the higher levels of functioning over the past year. Both scales showed good to excellent concurrent validity as measured by correlation with the Social and Occupational Functioning Assessment Scale (SOFAS) and the Personal and Social Performance Scale (PSP). CONCLUSION Overall, this study confirms the reliability and validity of the French version of the GF:S and GF:R scales. The use of these scales may improve the evaluation of social and occupational functioning in French-speaking young help-seekers, in a transdiagnostic approach, both in clinical and research settings.
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Affiliation(s)
- Valeria Lucarini
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Mathilde Kazes
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Emma Krebs
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Valentine Morin
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Maud Godignon
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
| | - Marie De Gasquet
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Trang Ton
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
- JENESIS/CRISALID, Pôle PRERPS, CHI EPSM Oise, Clermont de l'Oise, France
| | - Marion Féron
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
- JENESIS/CRISALID, Pôle PRERPS, CHI EPSM Oise, Clermont de l'Oise, France
| | - Guillaume Tanguy
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
| | - Agnès Lévi
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
| | - Cécile Bellot
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
| | - Dominique Willard
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
| | - Andrea M Auther
- Division of Psychiatry Research, The Zucker Hillside Hospital, Northwell Health, Glen Oaks, New York, New York, USA
- Department of Psychiatry, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, USA
| | - Barbara Cornblatt
- Division of Psychiatry Research, The Zucker Hillside Hospital, Northwell Health, Glen Oaks, New York, New York, USA
- Department of Psychiatry, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, USA
- Center for Psychiatric Neuroscience, Feinstein Institutes for Medical Research, Northwell Health, Manhasset, New York, USA
- Department of Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, USA
| | - Marie-Cécile Bralet
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
- JENESIS/CRISALID, Pôle PRERPS, CHI EPSM Oise, Clermont de l'Oise, France
| | - Marie-Odile Krebs
- Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Université Paris Cité, Paris, France
- CJAAD, Evaluation, Prevention and Therapeutic Innovation Department, GHU Paris Psychiatrie et Neurosciences, Paris, France
- Institut de Psychiatrie, CNRS GDR 3557, Paris, France
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Perrottelli A, Giordano GM, Brando F, Giuliani L, Pezzella P, Mucci A, Galderisi S. Unveiling the Associations between EEG Indices and Cognitive Deficits in Schizophrenia-Spectrum Disorders: A Systematic Review. Diagnostics (Basel) 2022; 12:diagnostics12092193. [PMID: 36140594 PMCID: PMC9498272 DOI: 10.3390/diagnostics12092193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Cognitive dysfunctions represent a core feature of schizophrenia-spectrum disorders due to their presence throughout different illness stages and their impact on functioning. Abnormalities in electrophysiology (EEG) measures are highly related to these impairments, but the use of EEG indices in clinical practice is still limited. A systematic review of articles using Pubmed, Scopus and PsychINFO was undertaken in November 2021 to provide an overview of the relationships between EEG indices and cognitive impairment in schizophrenia-spectrum disorders. Out of 2433 screened records, 135 studies were included in a qualitative review. Although the results were heterogeneous, some significant correlations were identified. In particular, abnormalities in alpha, theta and gamma activity, as well as in MMN and P300, were associated with impairments in cognitive domains such as attention, working memory, visual and verbal learning and executive functioning during at-risk mental states, early and chronic stages of schizophrenia-spectrum disorders. The review suggests that machine learning approaches together with a careful selection of validated EEG and cognitive indices and characterization of clinical phenotypes might contribute to increase the use of EEG-based measures in clinical settings.
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Almeida VN, Radanovic M. Semantic priming and neurobiology in schizophrenia: A theoretical review. Neuropsychologia 2021; 163:108058. [PMID: 34655651 DOI: 10.1016/j.neuropsychologia.2021.108058] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 12/11/2022]
Abstract
In this theoretical review we bridge the cognitive and neurobiological sciences to shed light on the neurocognitive foundations of the semantic priming effect in schizophrenia. We review and theoretically evaluate the neurotransmitter systems (dopaminergic, GABAergic and glutamatergic) and neurobiological underpinnings of behavioural and electrophysiological (N400) semantic priming in the pathology, and the main hypotheses on their geneses: a disinhibition of the semantic spread of activation, a disorganised semantic storage or noisy lexical-semantic associations, a psychomotor artefact, an artefact of relatedness proportions, or an inability to mobilise contextual information. We further assess the literature on the endophenotype of Formal Thought Disorder from multiple standpoints, ranging from neurophysiology to cognition: considerations are weaved on neuronal (PV basket cell, SST, VIP) and receptor deficits (DRD1, NMDA), neurotransmitter imbalances (dopamine), cortical and dopaminergic lateralisation, inter alia. In conclusion, we put forth novel postulates on the underlying causes of controlled hypopriming, automatic hyperpriming, N400 reversals (larger amplitudes for close associations), indirect versus direct hyperpriming, and the endophenotype of lexical-semantic disturbances in schizophrenia.
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Affiliation(s)
- Victor N Almeida
- Faculdade de Letras, Universidade Federal de Minas Gerais (UFMG), Av. Pres. Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
| | - Marcia Radanovic
- Laboratório de Neurociências (LIM-27), Faculdade de Medicina, Departamento e Instituto de Psiquiatria, Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Brazil
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Perrottelli A, Giordano GM, Brando F, Giuliani L, Mucci A. EEG-Based Measures in At-Risk Mental State and Early Stages of Schizophrenia: A Systematic Review. Front Psychiatry 2021; 12:653642. [PMID: 34017273 PMCID: PMC8129021 DOI: 10.3389/fpsyt.2021.653642] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/06/2021] [Indexed: 12/17/2022] Open
Abstract
Introduction: Electrophysiological (EEG) abnormalities in subjects with schizophrenia have been largely reported. In the last decades, research has shifted to the identification of electrophysiological alterations in the prodromal and early phases of the disorder, focusing on the prediction of clinical and functional outcome. The identification of neuronal aberrations in subjects with a first episode of psychosis (FEP) and in those at ultra high-risk (UHR) or clinical high-risk (CHR) to develop a psychosis is crucial to implement adequate interventions, reduce the rate of transition to psychosis, as well as the risk of irreversible functioning impairment. The aim of the review is to provide an up-to-date synthesis of the electrophysiological findings in the at-risk mental state and early stages of schizophrenia. Methods: A systematic review of English articles using Pubmed, Scopus, and PsychINFO was undertaken in July 2020. Additional studies were identified by hand-search. Electrophysiological studies that included at least one group of FEP or subjects at risk to develop psychosis, compared to healthy controls (HCs), were considered. The heterogeneity of the studies prevented a quantitative synthesis. Results: Out of 319 records screened, 133 studies were included in a final qualitative synthesis. Included studies were mainly carried out using frequency analysis, microstates and event-related potentials. The most common findings included an increase in delta and gamma power, an impairment in sensory gating assessed through P50 and N100 and a reduction of Mismatch Negativity and P300 amplitude in at-risk mental state and early stages of schizophrenia. Progressive changes in some of these electrophysiological measures were associated with transition to psychosis and disease course. Heterogeneous data have been reported for indices evaluating synchrony, connectivity, and evoked-responses in different frequency bands. Conclusions: Multiple EEG-indices were altered during at-risk mental state and early stages of schizophrenia, supporting the hypothesis that cerebral network dysfunctions appear already before the onset of the disorder. Some of these alterations demonstrated association with transition to psychosis or poor functional outcome. However, heterogeneity in subjects' inclusion criteria, clinical measures and electrophysiological methods prevents drawing solid conclusions. Large prospective studies are needed to consolidate findings concerning electrophysiological markers of clinical and functional outcome.
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Affiliation(s)
- Andrea Perrottelli
- Department of Psychiatry, University of Campania "Luigi Vanvitelli", Naples, Italy
| | | | - Francesco Brando
- Department of Psychiatry, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Luigi Giuliani
- Department of Psychiatry, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Armida Mucci
- Department of Psychiatry, University of Campania "Luigi Vanvitelli", Naples, Italy
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