Structural neuroimaging studies have identified abnormalities in the basal ganglia in patients with bipolar disorder. Findings have been mixed with regard to affective state and have not elaborated on the role of medication on functional brain activity. The aims of the present study were to use functional magnetic resonance imaging (fMRI) to test whether depressed and manic bipolar disorder patients differ in terms of activity in cortical and subcortical brain areas and to examine the effects of psychotropic medication. Twenty-four bipolar disorder subjects and 13 healthy comparison subjects participated in an fMRI study of manual reaction time. Both manic and depressed subjects exhibited abnormally elevated blood oxygen level dependent BOLD responses in cortical and subcortical areas. Manic bipolar subjects had significantly higher BOLD responses in the left globus pallidus and significantly lower BOLD responses in the right globus pallidus compared with depressed bipolar patients. Correlational analyses revealed significant relationships between the severity of mania and activity within the globus pallidus and caudate. Patients off antipsychotic or mood-stabilizing medication exhibited significantly higher BOLD responses throughout the motor cortex, basal ganglia and thalamus compared with patients on these medications. These results suggest that affective state in bipolar disorder may be related to a disturbance of inhibitory regulation within the basal ganglia and that antipsychotics and/or mood stabilizers normalize cortical and subcortical hyperactivity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0925-4927(03)00075-1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Heterogeneity analysis provides evidence for a genetically homogeneous subtype of bipolar-disorder.
PLoS One
January 2025
Department of Psychiatry, University of California San Diego, La Jolla, CA, United States of America.
Background: Bipolar Disorder (BD) is a complex disease. It is heterogeneous, both at the phenotypic and genetic level, although the extent and impact of this heterogeneity is not fully understood. One way to assess this heterogeneity is to look for patterns in the subphenotype data.
View Article and Find Full Text PDFMental Health Disparities by Sexual Orientation and Gender Identity in the All of Us Research Program.
JAMA Netw Open
January 2025
Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, California.
Importance: Limited research explores mental health disparities between individuals in sexual and gender minority (SGM) populations and cisgender heterosexual (non-SGM) populations using national-level data.
Objective: To explore mental health disparities between SGM and non-SGM populations across sexual orientation, sex assigned at birth, and gender identity within the All of Us Research Program.
Design, Setting, And Participants: This cross-sectional study used survey data and linked electronic health records of eligible All of Us Research Program participants from May 31, 2017, to June 30, 2022.
Silence as epistemic agency in mania.
Med Health Care Philos
January 2025
Department of Philosophy, University of Bristol, Bristol, UK.
Silence is a byword for socially imposed harm in the burgeoning literature on epistemic injustice in psychiatry. While some silence is harmful and should be broken, this understanding of silence is untenably simplistic. Crucially, it neglects the possibility that silence can also play a constructive epistemic role in the lives of people with mental illness.
View Article and Find Full Text PDFCausal associations between immune cells and psychiatric disorders: a bidirectional mendelian randomization analysis.
Naunyn Schmiedebergs Arch Pharmacol
January 2025
Graduate School of PLA Medical College, Chinese PLA General Hospital and PLA Medical College, 28 Fu Xing Road, Beijing, 100083, China.
Extensive researches illuminate a potential interplay between immune traits and psychiatric disorders. However, whether there is the causal relationship between the two remains an unresolved question. We conducted a two-sample bidirectional mendelian randomization by utilizing summary data of 731 immune cell traits from genome-wide association studies (GCST90001391-GCST90002121)) and 11 psychiatric disorders including attention deficit/hyperactivity disorder (ADHD), anxiety disorder, autism spectrum disorder (ASD), bipolar disorder (BIP), anorexia nervosa (AN), major depressive disorder (MDD), obsessive-compulsive disorder (OCD), Tourette syndrome (TS), post-traumatic stress disorder (PTSD), schizophrenia (SCZ), and substance use disorders (cannabis) (SUD) from the Psychiatric Genomics Consortium (PGC).
View Article and Find Full Text PDFDissociable ventral and dorsal sensorimotor functional circuits linking the hypomanic personality traits to aggression via behavioral inhibition system.
Int J Clin Health Psychol
January 2025
Faculty of Psychology, Tianjin Normal University, Tianjin, 300387, China.
Article Synopsis
- Hypomanic personality traits (HPT) are linked to higher risk for psychiatric disorders like bipolar disorder and are associated with aggressive behaviors, yet the underlying neuropsychological mechanisms are not fully understood.
- The study used psychometric network analysis to identify key factors (Behavioral Inhibition System and mood volatility) that connect HPT to aggression, finding that mood volatility positively correlates with aggression, with BIS acting as a mediator.
- Further imaging studies revealed distinct functions of the dorsal and ventral sensorimotor cortices in processing rewards, and resting-state imaging confirmed these regions' connections to different brain networks, highlighting the importance of these circuits in mediating the relationship between mood volatility, aggression, and BIS.
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!