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Objective The purpose of this study was to establish the diffusion-weighted magnetic resonance imaging (DW-MRI) findings of the caudate nucleus and putamen in patients with obsessive-compulsive disorder (OCD) and to obtain new information on the etiopathogenesis of OCD, which is still unclear. Methods The study comprised 20 patients with OCDs and 20 healthy volunteers. In these cases, DW-MRI and diffusion-weighted echo-planar images (DW-EPI) at b600 and b1000 gradient values were taken and the measurements were made using the apparent diffusion coefficient (ADC) maps of each group at b600 and b1000 values from the caudate nucleus and putamen. Results When the DW-MRI examination in patients with OCD was compared with the control group, the mean ADC values in the caudate nucleus and putamen were not found to have statistically significantly changed. In addition, there were no significant differences regarding the right and left caudate nuclei and putamen ADC values at the b600 and b1000 in the patients with OCD or the control group. Conclusion There are still many unknowns about the neurobiology of OCD. When the DW-MRI examination of the patients with OCD was compared with the control group in our study, no significant difference was found between the ADC values of the caudate nucleus and putamen. Further studies are required for this present study on DW-MRI in patients with OCD to be meaningful.
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http://dx.doi.org/10.7759/cureus.17023 | DOI Listing |
Acta Histochem
September 2025
Division of Neuroanatomy, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, 1‑1‑1 Minami‑Kogushi, Ube 755‑8505, Japan. Electronic address:
Cholinergic neurons in the basal forebrain cholinergic nuclei (BFCN) and neostriatum (CPu) play key roles in learning, attention, and motor control. The loss of cholinergic neurons causes major neurodegenerative diseases such as Alzheimer's disease. This study aimed to elucidate the molecular diversity of choline acetyltransferase immunoreactive (ChAT-ir) neurons in these brain regions.
View Article and Find Full Text PDFMol Psychiatry
September 2025
Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.
Iron-the most abundant magnetic brain substance-is essential for many biological processes, including dopamine and myelin synthesis. Quantitative susceptibility mapping (QSM) MRI has recently linked altered subcortical magnetic susceptibility (χ) to schizophrenia. Since χ is increased by iron and decreased by myelin, abnormal levels of either could underlie these QSM differences.
View Article and Find Full Text PDFJ Affect Disord
September 2025
University of Denver, Department of Psychology, United States of America; University of California, Irvine, Department of Pediatrics, United States of America. Electronic address:
Anhedonia is increasingly recognized as a transdiagnostic risk factor for psychopathology. New evidence demonstrates that anhedonia is present in infancy and early childhood. Structural variability in striatal regions involved in reward processing and pleasure seeking is concurrently linked to anhedonia, yet few studies have examined whether striatal differences presage anhedonia, and none have examined prospective associations before middle childhood.
View Article and Find Full Text PDFbioRxiv
August 2025
Department of Bioengineering, University of California Riverside, CA.
Frailty is characterized by a persistent and progressive decline in physiological reserves, leading to increased vulnerability to stressors and a heightened risk of adverse health outcomes, both physically and mentally. Despite frailty's prevalence in older adults, there is limited research on its neural substrates, especially using task-based brain functional connectivity. In this study, we used connectome-based predictive modelling (CPM) to find a linear relationship between task-based connectomes - taken from tasks that involved similar handgrip manipulations - and a separate measure of frailty: the maximum grip strength in older adults.
View Article and Find Full Text PDFEur J Neurosci
September 2025
Department of Philosophy, Social Sciences and Education, University of Perugia, Perugia, Italy.
Attention-deficit/hyperactivity disorder (ADHD) is a prevalent neurodevelopmental disorder marked-among other features-by impairments in response inhibition, a complex cognitive process assessable through tasks that either involve conflict suppression (C tasks) or do not (no-C tasks). Previous research has linked impaired response inhibition in ADHD primarily to structural and functional abnormalities in fronto-striatal and fronto-parietal networks. However, it remains unclear how these neural circuits differentially support performance on C and no-C tasks in individuals with ADHD.
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