Schizophrenia Bulletin最新文献

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Repetitive Transcranial Magnetic Stimulation (rTMS) Treatment Reduces Variability in Brain Function in Schizophrenia: Data From a Double-Blind, Randomized, Sham-Controlled Trial. 重复经颅磁刺激(rTMS)治疗可降低精神分裂症患者大脑功能的变异性:一项双盲、随机、假对照试验的数据。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-10-07 DOI: 10.1093/schbul/sbae166
Christin Schifani, Colin Hawco, Zafiris J Daskalakis, Tarek K Rajji, Benoit H Mulsant, Vinh Tan, Erin W Dickie, Iska Moxon-Emre, Daniel M Blumberger, Aristotle N Voineskos
{"title":"Repetitive Transcranial Magnetic Stimulation (rTMS) Treatment Reduces Variability in Brain Function in Schizophrenia: Data From a Double-Blind, Randomized, Sham-Controlled Trial.","authors":"Christin Schifani, Colin Hawco, Zafiris J Daskalakis, Tarek K Rajji, Benoit H Mulsant, Vinh Tan, Erin W Dickie, Iska Moxon-Emre, Daniel M Blumberger, Aristotle N Voineskos","doi":"10.1093/schbul/sbae166","DOIUrl":"https://doi.org/10.1093/schbul/sbae166","url":null,"abstract":"<p><strong>Background/hypothesis: </strong>There is increasing awareness of interindividual variability in brain function, with potentially major implications for repetitive transcranial magnetic stimulation (rTMS) efficacy. We perform a secondary analysis using data from a double-blind randomized controlled 4-week trial of 20 Hz active versus sham rTMS to dorsolateral prefrontal cortex (DLPFC) during a working memory task in participants with schizophrenia. We hypothesized that rTMS would change local functional activity and variability in the active group compared with sham.</p><p><strong>Study design: </strong>83 participants were randomized in the original trial, and offered neuroimaging pre- and post-treatment. Of those who successfully completed both scans (n = 57), rigorous quality control left n = 42 (active/sham: n = 19/23), who were included in this analysis. Working memory-evoked activity during an N-Back (3-Back vs 1-Back) task was contrasted. Changes in local brain activity were examined from an 8 mm ROI around the rTMS coordinates. Individual variability was examined as the mean correlational distance (MCD) in brain activity pattern from each participant to others within the same group.</p><p><strong>Results: </strong>We observed an increase in task-evoked left DLPFC activity in the active group compared with sham (F1,36 = 5.83, False Discovery Rate (FDR))-corrected P = .04). Although whole-brain activation patterns were similar in both groups, active rTMS reduced the MCD in activation pattern compared with sham (F1,36 = 32.57, P < .0001). Reduction in MCD was associated with improvements in attention performance (F1,16 = 14.82, P = .0014, uncorrected).</p><p><strong>Conclusions: </strong>Active rTMS to DLPFC reduces individual variability of brain function in people with schizophrenia. Given that individual variability is typically higher in schizophrenia patients compared with controls, such reduction may \"normalize\" brain function during higher-order cognitive processing.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relapse Following Electroconvulsive Therapy for Schizophrenia: A Systematic Review and Meta-analysis. 电休克疗法治疗精神分裂症后的复发:系统回顾与元分析》。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-10-04 DOI: 10.1093/schbul/sbae169
Nobuatsu Aoki, Aran Tajika, Taro Suwa, Hirotsugu Kawashima, Kazuyuki Yasuda, Toshiyuki Shimizu, Niina Uchinuma, Hirotaka Tominaga, Xiao Wei Tan, Azriel H K Koh, Phern Chern Tor, Stevan Nikolin, Donel Martin, Masaki Kato, Colleen Loo, Toshihiko Kinoshita, Toshi A Furukawa, Yoshiteru Takekita
{"title":"Relapse Following Electroconvulsive Therapy for Schizophrenia: A Systematic Review and Meta-analysis.","authors":"Nobuatsu Aoki, Aran Tajika, Taro Suwa, Hirotsugu Kawashima, Kazuyuki Yasuda, Toshiyuki Shimizu, Niina Uchinuma, Hirotaka Tominaga, Xiao Wei Tan, Azriel H K Koh, Phern Chern Tor, Stevan Nikolin, Donel Martin, Masaki Kato, Colleen Loo, Toshihiko Kinoshita, Toshi A Furukawa, Yoshiteru Takekita","doi":"10.1093/schbul/sbae169","DOIUrl":"https://doi.org/10.1093/schbul/sbae169","url":null,"abstract":"<p><strong>Background: </strong>Evidence regarding schizophrenia relapse following acute electroconvulsive therapy (ECT) is sparse compared with that for depression, and we have no clear consensus on relapse proportions. We aimed to provide longitudinal information on schizophrenia relapse following acute ECT.</p><p><strong>Study design: </strong>This systematic review and meta-analysis included randomised controlled trials (RCTs) and observational studies on post-acute ECT relapse and rehospitalization for schizophrenia and related disorders. For the primary outcome, we calculated the post-acute ECT pooled relapse estimates at each timepoint (3, 6, 12, and 24 months post-acute ECT) using a random effects model. For subgroup analyses, we investigated post-acute ECT relapse proportions by the type of maintenance therapy.</p><p><strong>Study results: </strong>Among a total of 6413 records, 29 studies (3876 patients) met our inclusion criteria. The risk of bias was consistently low for all included RCTs (4 studies), although it ranged from low to high for observational studies (25 studies). Pooled estimates of relapse proportions among patients with schizophrenia responding to acute ECT were 24% (95% CI: 15-35), 37% (27-47), 41% (34-49), and 55% (40-69) at 3, 6, 12, and 24 months, respectively. When continuation/maintenance ECT was added to antipsychotics post-acute ECT, the 6-month relapse proportion was 20% (11-32).</p><p><strong>Conclusion: </strong>Relapse occurred mostly within 6 months post-acute ECT for schizophrenia, particularly within the first 3 months. Relapse proportions plateaued after 6 months, although more than half of all patients could be expected to relapse within 2 years. Further high-quality research is needed to optimise post-acute ECT treatment strategies in patients with schizophrenia.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142375901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
L'espace vécu and Its Perturbations in Schizophrenia: Systematic Review and Meta-analysis of Altered Body-Centric Metrics-Personal and Peripersonal Space. 精神分裂症患者的空间感及其干扰:对以身体为中心的度量--个人空间和周身空间的改变进行系统回顾和元分析。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-10-02 DOI: 10.1093/schbul/sbae159
Andrea Raballo, Michele Poletti, Francesco Bevione, Maria Carla Lacidogna, Antonio Preti
{"title":"L'espace vécu and Its Perturbations in Schizophrenia: Systematic Review and Meta-analysis of Altered Body-Centric Metrics-Personal and Peripersonal Space.","authors":"Andrea Raballo, Michele Poletti, Francesco Bevione, Maria Carla Lacidogna, Antonio Preti","doi":"10.1093/schbul/sbae159","DOIUrl":"10.1093/schbul/sbae159","url":null,"abstract":"<p><p>Subtle distortions of the experience of lived space have long been associated with schizophrenia. Although a body-centric transformation of space is considered an essential component of anomalous subjective experience in schizophrenia, its impact on the 2 major body-centric spatial constructs, that is, personal space (PS) and peripersonal space (PPS), is still not clear. This systematic review and meta-analysis have been set up to: (1) summarize the evidence on putative extensional differences of PS and PPS in schizophrenia as compared with controls, and (2) evaluate the quality and the limitations of available studies on the topic. Four electronic literature databases (MEDLINE, EMBASE, PsychINFO, and CINAHL) were searched with the keywords \"Personal space OR Interpersonal distance AND Schizophrenia,\" \"Peripersonal space AND Schizophrenia\" from inception until December 31, 2023, resulting in 15 studies on PS and 5 studies on PPS included in this systematic review. The 12 studies on PS included in the meta-analysis revealed that individuals with a diagnosis of schizophrenia place a larger interpersonal distance from the stimuli than controls, with a moderate effect size in both the fixed-effect model (Hedges' g = 0.558 [95% confidence interval, CI: 0.445-0.671]; z = 9.67; P < 0.0001) and the random effects model (0.547 [0.294-0.799]; z = 4.77; P = 0.0006). The 5 studies included in the meta-analysis on PPS showed that individuals with a diagnosis of schizophrenia exhibit a narrower PPS than the controls at the fixed-effect (Hedges' g = 1.043 [95%CI: .739-1.348]; z = 6.72; P < .0001), but not at the random effects model (1.318 [-0.721 to 3.359]; z = 1.79; P = .147). Heterogeneity was substantial in both meta-analyses. Overall, the findings indicate that both body-centered space constructs (PS and PPS) are affected in schizophrenia, with an enlargement PS and a reduction PPS, thereby supporting the distinction of these constructs. These modifications cohere with the subjective transformation of the lived space (aka espace vécu) reported in classical psychopathology and may be promising, neurodevelopmentally grounded, biomarkers of vulnerability to schizophrenia and its spectrum conditions.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142366440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficacy of User Self-Led and Human-Supported Digital Health Interventions for People With Schizophrenia: A Systematic Review and Meta-Analysis 针对精神分裂症患者的用户自导和人工支持数字健康干预措施的功效:系统回顾与元分析
IF 6.6 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-28 DOI: 10.1093/schbul/sbae143
Urska Arnautovska, Mike Trott, Kathryn Jemimah Vitangcol, Alyssa Milton, Ellie Brown, Nicola Warren, Stefan Leucht, Joseph Firth, Dan Siskind
{"title":"Efficacy of User Self-Led and Human-Supported Digital Health Interventions for People With Schizophrenia: A Systematic Review and Meta-Analysis","authors":"Urska Arnautovska, Mike Trott, Kathryn Jemimah Vitangcol, Alyssa Milton, Ellie Brown, Nicola Warren, Stefan Leucht, Joseph Firth, Dan Siskind","doi":"10.1093/schbul/sbae143","DOIUrl":"https://doi.org/10.1093/schbul/sbae143","url":null,"abstract":"Background Digital health interventions (DHIs) may enable low cost, scalable improvements in the quality of care for adults with schizophrenia. Given the fast-growing number of studies using these tools, this review aimed to assess the efficacy and feasibility of randomized controlled trials (RCTs) of DHIs among people with schizophrenia, focusing on human support. Design A systematic search of PubMed, Embase, PsycINFO, CINAHL, Web of Science, and Cochrane databases was conducted in January 2024 to identify relevant RCTs. Random effects meta-analyses were undertaken to evaluate the effects on psychosis symptoms, cognition, and other health-related outcomes. Results Twenty-six RCTs (n = 2481 participants) were included. Pooled recruitment and retention rates were 57.4% and 87.6%, respectively. DHIs showed no statistically significant effect sizes across all examined outcomes, including psychosis symptoms, depression, quality of life, global and social cognition, global and social functioning, and medication adherence. A third (34.6%) of DHIs were developed using co-design while the majority (70%) personalized the intervention to its users and 69.2% were deemed to be at high risk of bias. There were trends toward effects in favor of DHIs with human support for social cognition and quality of life. Conclusions DHIs are feasible for people with schizophrenia and potentially useful for improving health outcomes, particularly when including human support. More high-quality studies are required to examine the benefits of human support within DHIs. Future research should examine the feasibility of sustained adherence and benefits from digital interventions, possibly incorporating human interaction complemented with artificial intelligence, in real-world clinical settings.","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":"1 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142329197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
When Atypical Antipsychotics Were New. 当非典型抗精神病药物还是新生事物时。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-26 DOI: 10.1093/schbul/sbae170
Susan Weiner
{"title":"When Atypical Antipsychotics Were New.","authors":"Susan Weiner","doi":"10.1093/schbul/sbae170","DOIUrl":"https://doi.org/10.1093/schbul/sbae170","url":null,"abstract":"","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142353112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anhedonia Across and Beyond the Schizophrenia Spectrum 精神分裂症谱系内外的失神症
IF 6.6 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-26 DOI: 10.1093/schbul/sbae165
Raymond C K Chan, Ling-ling Wang, Jia Huang, Yi Wang, Simon S Y Lui
{"title":"Anhedonia Across and Beyond the Schizophrenia Spectrum","authors":"Raymond C K Chan, Ling-ling Wang, Jia Huang, Yi Wang, Simon S Y Lui","doi":"10.1093/schbul/sbae165","DOIUrl":"https://doi.org/10.1093/schbul/sbae165","url":null,"abstract":"Anhedonia refers to the diminished ability to experience pleasure, and is a core feature of schizophrenia (SCZ). The neurocognitive and neural correlates of anhedonia remain elusive. Based on several influential theoretical models for negative symptoms, this selective review proposed four important neurocognitive domains, which may unveil the neurobiological mechanisms of anhedonia. The authors critically reviewed the current evidence regarding value representation of reward, prospection, emotion-behavior decoupling, and belief updating in the Chinese setting, covering both behavioral and neuroimaging research. We observed a limited application of the transdiagnostic approach in previous studies on the four domains, and the lack of adequate measures to tap into the expressivity deficit in SCZ. Despite many behavioral paradigms for these four domains utilized both social and non-social stimuli, previous studies seldom focused on the social-versus-non-social differentiation. We further advocated several important directions for future research.","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":"217 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increased Sensitivity to Effort and Perception of Effort in People with Schizophrenia. 精神分裂症患者对努力和努力感知的敏感性增强。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-21 DOI: 10.1093/schbul/sbae162
Adam J Culbreth, Vikram S Chib, Safa S Riaz, Sanjay G Manohar, Masud Husain, James A Waltz, James M Gold
{"title":"Increased Sensitivity to Effort and Perception of Effort in People with Schizophrenia.","authors":"Adam J Culbreth, Vikram S Chib, Safa S Riaz, Sanjay G Manohar, Masud Husain, James A Waltz, James M Gold","doi":"10.1093/schbul/sbae162","DOIUrl":"https://doi.org/10.1093/schbul/sbae162","url":null,"abstract":"<p><strong>Objective: </strong>Motivational deficits in schizophrenia are proposed to be attributable in part to abnormal effort-cost computations, calculations weighing the costs vs. the benefits of actions. Several reports have shown that people with schizophrenia display a reduced willingness to exert effort for monetary rewards when compared to controls. The primary goal of the current study was to further characterize reduced willingness to exert effort in schizophrenia by determining whether reduced willingness reflects (1) reduced sensitivity to reward, (2) increased sensitivity to effort, or (3) a combination of both.</p><p><strong>Design: </strong>We assessed effort-cost decision-making in 30 controls and 30 people with schizophrenia, using 2 separate experimental tasks. Critically, one paradigm allowed for independent estimation of effects of reward and effort sensitivity on choice behavior. The other task isolated effort sensitivity by measuring effort in the absence of reward. Clinical interviews and self-report questionnaires were administered to people with schizophrenia to determine negative symptom severity.</p><p><strong>Results: </strong>Across both tasks, we found evidence for reduced willingness to exert effort in people with schizophrenia compared to controls. Further, in both paradigms reduced willingness to exert effort was driven by increased sensitivity to effort in people with schizophrenia compared to controls. In contrast, measures of reward sensitivity did not significantly differ between groups. Surprisingly, we did not find correlations between task variables and measures of negative symptom severity.</p><p><strong>Conclusions and relevance: </strong>These findings further specify prior work by identifying a specific contributory role for increased effort sensitivity in effort-cost decision-making deficits in schizophrenia.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142294419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Safety of rTMS for Schizophrenia: A Systematic Review and Meta-analysis. 经颅磁刺激治疗精神分裂症的安全性:系统回顾与元分析》。
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-15 DOI: 10.1093/schbul/sbae158
Sophia H Blyth, Claudia Cruz Bosch, Julian J Raffoul, Jordyn Chesley, Benjamin Johnson, Darara Borodge, Raza Sagarwala, Ross Masters, Roscoe O Brady, Simon Vandekar, Heather Burrell Ward
{"title":"Safety of rTMS for Schizophrenia: A Systematic Review and Meta-analysis.","authors":"Sophia H Blyth, Claudia Cruz Bosch, Julian J Raffoul, Jordyn Chesley, Benjamin Johnson, Darara Borodge, Raza Sagarwala, Ross Masters, Roscoe O Brady, Simon Vandekar, Heather Burrell Ward","doi":"10.1093/schbul/sbae158","DOIUrl":"https://doi.org/10.1093/schbul/sbae158","url":null,"abstract":"<p><strong>Background and hypothesis: </strong>Current treatments for schizophrenia are only partially effective, and there are no medications for negative symptoms or cognitive impairment. Neuromodulation, such as repetitive transcranial magnetic stimulation (rTMS), has potential as a novel intervention for schizophrenia. Prior to clinical use, rTMS should have demonstrated safety in a large schizophrenia population. However, the safety profile of rTMS in schizophrenia is not well characterized, and regulatory agencies have expressed concern about safety in this population.</p><p><strong>Study design: </strong>We conducted a systematic review with meta-analysis of rTMS studies in schizophrenia. We searched PubMed, the Cochrane Library, PsycINFO, and Science Citation Index Expanded for rTMS studies in schizophrenia that reported adverse effects. We extracted the number of participants who experienced an adverse effect and calculated the prevalence of each adverse effect for active or sham rTMS. We tested the difference between the prevalence of events in the active and sham conditions. We assessed risk of bias using the Cochrane Handbook.</p><p><strong>Study results: </strong>The initial search identified 1472 studies. After screening, 261 full-text studies were assessed, and 126 met inclusion criteria (N = 4122 total subjects). The prevalence of headache or scalp pain, dizziness or syncope, facial twitching, and nausea was higher for active rTMS compared to sham (P < .05). The prevalence of all other adverse effects, including seizure, was not different between active and sham rTMS.</p><p><strong>Conclusions: </strong>rTMS is safe and well tolerated for people with schizophrenia. Individuals with schizophrenia are not at increased risk for adverse effects, including seizure, compared to the general population.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142294420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Common Structure of the Major Psychoses: More Similarities Than Differences in the Network Structures of Schizophrenia, Schizoaffective Disorder, and Psychotic Bipolar Disorder 主要精神病的共同结构:精神分裂症、分裂情感障碍和双相情感障碍网络结构的相似之处多于不同之处
IF 6.6 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-11 DOI: 10.1093/schbul/sbae154
Wen Shao, Melanie Simmonds-Buckley, Orestis Zavlis, Richard P Bentall
{"title":"The Common Structure of the Major Psychoses: More Similarities Than Differences in the Network Structures of Schizophrenia, Schizoaffective Disorder, and Psychotic Bipolar Disorder","authors":"Wen Shao, Melanie Simmonds-Buckley, Orestis Zavlis, Richard P Bentall","doi":"10.1093/schbul/sbae154","DOIUrl":"https://doi.org/10.1093/schbul/sbae154","url":null,"abstract":"Background and Hypothesis There has been a century-long debate about whether the major psychoses (eg, bipolar disorder, schizophrenia, and schizoaffective disorder) are one disorder with various manifestations or different disease entities. Traditional approaches using dimensional models have not provided decisive findings. Here, we address this question by examining the network constellation of affective and psychotic syndromes. Design Comparable symptom data of 1882 patients with psychotic bipolar disorder, schizoaffective disorders, and schizophrenia were extracted from three datasets: B-SNIP 1, B-SNIP2, and PARDIP. Twenty-six items from the Positive and Negative Syndrome Scale, YMRS, and the Montgomery-Asberg Depression Rating Scale were selected for the analysis using a principled approach to eliminate overlapping/redundant items. Gaussian graphical models were estimated and assessed for stability, and their communities were identified using bootstrapped exploratory graph analysis. The structures and global densities of the networks were compared with network comparison tests. Results The network structures were highly similar (r &amp;gt;. 80) across diagnostic groups. For all diagnoses, manic symptoms were more connected with positive symptoms while depressive symptoms were more linked with negative symptoms. The depressive and negative symptoms were the strongest indicators of depressive and psychotic communities. Theoretically interesting variability in network edge weights between symptoms was found relating to thought disorder and pessimistic thinking. Conclusions The same broad structure of psychopathology underlies the symptom expressions of bipolar disorder, schizoaffective disorder, and schizophrenia. Future studies should build on the present finding by comparing specific inter-relations between symptoms in the different diagnostic groups using methods capable of detecting causality.","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":"35 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cognitive Mechanisms of Aberrant Self-Referential Social Perception in Psychosis and Bipolar Disorder: Insights From Computational Modeling. 精神病和躁郁症患者异常自我推断社交感知的认知机制:计算建模的启示
IF 5.3 1区 医学
Schizophrenia Bulletin Pub Date : 2024-09-11 DOI: 10.1093/schbul/sbae147
Carly A Lasagna, Ivy F Tso, Scott D Blain, Timothy J Pleskac
{"title":"Cognitive Mechanisms of Aberrant Self-Referential Social Perception in Psychosis and Bipolar Disorder: Insights From Computational Modeling.","authors":"Carly A Lasagna, Ivy F Tso, Scott D Blain, Timothy J Pleskac","doi":"10.1093/schbul/sbae147","DOIUrl":"10.1093/schbul/sbae147","url":null,"abstract":"<p><strong>Background and hypothesis: </strong>Individuals with schizophrenia (SZ) and bipolar disorder (BD) show disruptions in self-referential gaze perception-a social perceptual process related to symptoms and functioning. However, our current mechanistic understanding of these dysfunctions and relationships is imprecise.</p><p><strong>Study design: </strong>The present study used mathematical modeling to uncover cognitive processes driving gaze perception abnormalities in SZ and BD, and how they relate to cognition, symptoms, and social functioning. We modeled the behavior of 28 SZ, 38 BD, and 34 controls (HC) in a self-referential gaze perception task using drift-diffusion models parameterized to index key cognitive components: drift rate (evidence accumulation efficiency), drift bias (perceptual bias), start point (expectation bias), threshold separation (response caution), and nondecision time (encoding/motor processes).</p><p><strong>Study results: </strong>Results revealed that aberrant gaze perception in SZ and BD was driven by less efficient evidence accumulation, perceptual biases predisposing self-referential responses, and greater caution (SZ only). Across SZ and HC, poorer social functioning was related to greater expectation biases. Within SZ, perceptual and expectancy biases were associated with hallucination and delusion severity, respectively.</p><p><strong>Conclusions: </strong>These findings indicate that diminished evidence accumulation and perceptual biases may underlie altered gaze perception in patients and that SZ may engage in compensatory cautiousness, sacrificing response speed to preserve accuracy. Moreover, biases at the belief and perceptual levels may relate to symptoms and functioning. Computational modeling can, therefore, be used to achieve a more nuanced, cognitive process-level understanding of the mechanisms of social cognitive difficulties, including gaze perception, in individuals with SZ and BD.</p>","PeriodicalId":21530,"journal":{"name":"Schizophrenia Bulletin","volume":" ","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142294418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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