AI Article Synopsis
- The study investigates how altered sensorimotor gating is measured in patients with early bipolar disorder and schizophrenia using both muscular and neural responses during Prepulse Inhibition (PPI) tests.
- Findings show that both neural and muscular PPI were significantly reduced in schizophrenia patients, while bipolar disorder patients displayed neural PPI deficits but not muscular.
- The results imply that using combined measures could provide new insights into sensory processing issues unique to each disorder.
Article Abstract
Background: Altered sensorimotor gating has been demonstrated by Prepulse Inhibition (PPI) tests in patients with psychosis. Recent advances in signal processing methods allow assessment of neural PPI through electroencephalogram (EEG) recording during acoustic startle response measures (classic muscular PPI). Simultaneous measurements of muscular (eye-blink) and neural gating phenomena during PPI test may help to better understand sensorial processing dysfunctions in psychosis. In this study, we aimed to assess simultaneously muscular and neural PPI in early bipolar disorder and schizophrenia patients.
Method: Participants were recruited from a population-based case-control study of first episode psychosis. PPI was measured using electromyography (EMG) and EEG in pulse alone and prepulse + pulse with intervals of 30, 60, and 120 ms in early bipolar disorder (n = 18) and schizophrenia (n = 11) patients. As control group, 15 socio-economically matched healthy subjects were recruited. All subjects were evaluated with Rating Scale, Hamilton Rating Scale for Depression, and Young Mania Rating Scale questionnaires at recruitment and just before PPI test. Wilcoxon ranked sum tests were used to compare PPI test results between groups.
Results: In comparison to healthy participants, neural PPI was significantly reduced in PPI 30 and PPI60 among bipolar and schizophrenia patients, while muscular PPI was reduced in PPI60 and PPI120 intervals only among patients with schizophrenia.
Conclusion: The combination of muscular and neural PPI evaluations suggested distinct impairment patterns among schizophrenia and bipolar disorder patients. Simultaneous recording may contribute with novel information in sensory gating investigations.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8773710 | PMC |
| http://dx.doi.org/10.3390/brainsci12010093 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Neurological Soft Signs in Type I Bipolar Disorder and Bipolar Spectrum Patients and Their Unaffected First-Degree Relatives: A Cross-Sectional Study.
Health Sci Rep
January 2025
School of Medicine, Behavioral Science Research Center of Imam Hossein Hospital Shahid Beheshti University of Medical Sciences Tehran Iran.
Background And Aims: This study aimed to compare neurological soft signs (NSSs) in type 1 bipolar disorder (BD), bipolar spectrum (BS) patients, and their unaffected first-degree relatives.
Methods: This descriptive cross-sectional study involved participants referred to the Psychiatric Department of Imam Hossein Hospital. Five groups ( = 25): patients with type 1 BD, patients with BS, unaffected first-degree relatives of the two groups, and a control group were evaluated using the Neurological Evaluation Scale (NES).
Identifying genetic differences between bipolar disorder and major depression through multiple genome-wide association analyses.
Br J Psychiatry
January 2025
Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, USA; Department of Human Genetics, University of California Los Angeles, USA; and Department of Computational Medicine, University of California Los Angeles, USA.
Background: Accurate diagnosis of bipolar disorder (BPD) is difficult in clinical practice, with an average delay between symptom onset and diagnosis of about 7 years. A depressive episode often precedes the first manic episode, making it difficult to distinguish BPD from unipolar major depressive disorder (MDD).
Aims: We use genome-wide association analyses (GWAS) to identify differential genetic factors and to develop predictors based on polygenic risk scores (PRS) that may aid early differential diagnosis.
Investigating resting-state functional connectivity changes within procedural memory network across neuropsychiatric disorders using fMRI.
BMC Med Imaging
January 2025
Department of Physiology, Faculty of Medicine, AJA University of Medical Science, Tehran, Iran.
Background: Cognitive networks impairments are common in neuropsychiatric disorders like Attention Deficit Hyperactivity Disorder (ADHD), bipolar disorder (BD), and schizophrenia (SZ). While previous research has focused on specific brain regions, the role of the procedural memory as a type of long-term memory to examine cognitive networks impairments in these disorders remains unclear. This study investigates alterations in resting-state functional connectivity (rs-FC) within the procedural memory network to explore brain function associated with cognitive networks in patients with these disorders.
View Article and Find Full Text PDFMetacognitive Training for Subjects with Bipolar Disorder: A Randomized Controlled Trial.
Psychother Psychosom
January 2025
Bipolar Disorder Research Program (PROMAN), Institute of Psychiatry, University of São Paulo Medical School, São Paulo, Brazil.
Introduction: Impairments in social cognition in bipolar disorder (BD) have been extensively described in the last decade but few treatment strategies have been studied to address this issue. This study presents findings from a randomized controlled trial (RCT) investigating the efficacy of metacognitive training for bipolar disorder (MCT-BD) compared to Treatment as Usual (TAU) among individuals with BD in remission. The aim was to determine whether MCT-BD could improve social cognition and overall functioning in this population.
View Article and Find Full Text PDFClinical and Demographic Predictors of Early Clozapine Discontinuation Across Mood and Psychotic Disorders.
J Clin Psychopharmacol
January 2025
Department of Pharmacy, Mayo Clinic, Rochester, MN.
Background: Clozapine is effective for treatment-resistant schizophrenia and bipolar disorder but is often discontinued due to adverse effects. This study compared early clozapine discontinuation rates and reasons in patients with mood and psychotic disorders.
Methods: Data from all individuals with mood or psychotic disorders who initiated clozapine for the first time at the inpatient psychiatric unit of Mayo Clinic, Rochester, Minnesota, between 2014 and 2022 were retrospectively analyzed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!