This paper will bring a brief overview of the clinical aspects of psychotic depression, with emphasis in the differentiation between mood-congruent and mood-incongruent delusions. Biological aspects of this disorder will be reviewed. Changes have been found in serotonergic and dopaminergic neurotransmission and also a characteristic shortening of REM latency. Alterations of hypothalamic-pituitary-adrenal (HPA) axis are especially prominent and may have specific features in this disorder. Attention will be given to structural brain alterations, cognitive impairments and the relationships of both with the HPA alterations previously described. Finally, a treatment update will be provided. Combination of antidepressants and antipsychotics is still the preferred psychopharmacologic treatment. There is recent research in selective serotonin reuptake inhibitors as monotherapy, atypical antipsychotics and antiglucocorticoid strategies but more investigations are needed.
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Background: Neuropsychiatric symptoms (NPS) constitute a major challenge for patients with Alzheimer's disease (AD). We have recently demonstrated that in AD, overall NPS burden is significantly associated with patient function. However, few studies have examined the relationship between specific symptom clusters with neurological biomarkers.
View Article and Find Full Text PDFBackground: Alzheimer's disease and related dementias (ADRD) prevalence varies geographically in the US. The Appalachian region has lower educational attainment and health care access barriers compared to non-Appalachian regions. The objective of this proposal is to assess whether the geographic variation of ADRD in Central Appalachia is explained by county-level sociodemographic factors or access to care.
View Article and Find Full Text PDFCannabis
December 2024
Department of Psychiatry, Faculty of Medicine, University of British Columbia.
Objective: The relationship between cannabis use and mental health has garnered significant attention in recent decades. However, studies have largely been in general populations or in countries in which recreational cannabis use is illegal.
Method: The current cross-sectional study examines the relationship between cannabis use, mood disorders, anxiety, and psychosis in an inpatient psychiatric population with severe concurrent mental health and substance use disorders, exploring the potential moderating effect of the legalization of recreational cannabis in Canada.
Mol Psychiatry
January 2025
Department of Radiology, NYU Grossman School of Medicine, New York, NY, USA.
Myelin abnormalities in white matter have been implicated in the pathophysiology of psychotic spectrum disorders (PSD), which are characterized by brain dysconnectivity as a core feature. Among evidence from in vivo MRI studies, diffusion imaging findings have largely supported disrupted white matter integrity in PSD; however, they are not specific to myelin changes. Using a multimodal imaging approach, the current study aimed to further delineate myelin and microstructural changes in the white matter of a young PSD cohort.
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