Background: Previous studies concerned with neuropsychological aspect of delusions, were mainly focused on specific forms of this disorder, such as Cotard or Capgras type of delusions. Comparatively small numbers of investigations were concerned with cognitive deficiencies accompanying the delusions. The substance of this study includes the detection of neuropsychological dysfunctions in patients with delusional disorder, and tracing of these cognitive distortions to appropriate brain regions.
Subjects And Methods: The investigation is designed as a comparative study. Inpatients with delusion are compared with normal subjects from the aspect of the following cognitive functions: attention, memory, visuospatial and visuoconstruction organization, executive ability, verbal divergent thinking.
Results: Attention, memory (verbal modality) and psychomotor skill tasks are most susceptible to delusional effects.
Conclusion: The neuropsychological profile of patients with delusional disorder includes impediment of complex attention modalities. From this primary disorder, there also stems a disorder of verbal memory in the sense of reduced recognition. These cognitive distortions suggest a dysfunction of the anterior regions of the cerebrum, mainly of the prefrontal and sinistral temporal regions.
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Schizophr Bull
January 2025
Clinical, Educational and Health Psychology, University College London, London, WC1E 6BT, UK.
Background And Hypothesis: Delusions are classified into themes but the range of themes reported in the literature has never been examined and the extent to which they differ in prevalence, or relate to clinical characteristics or cultural variation, remains poorly understood.
Study Design: We identified studies reporting delusional theme prevalence in adults with psychosis and completed two multivariate, multilevel, random-effects meta-analyses: one including data from structured assessment scales only and another also including data from ad hoc and clinical assessments to include themes from a wider range of countries and contexts. Sensitivity and meta-regression analyses examined the association with clinical and methodological variables.
We describe a 23-year-old woman with erotomania as a symptom of complicated grief. The delusional disorder emerged after a breakup with her partner, during a period of complicated grief following the unexpected loss of her twin brother. The delusion potentially functioned as a protection against a recurrent depressive disorder.
View Article and Find Full Text PDFCureus
December 2024
Department of Medicine, Tower Health Medical Group, Reading, USA.
Objective: The recent development of xylazine adulteration of the illicit opiate supply has been associated with necrotic extremity wounds of unclear pathogenesis. This study sought to understand the prevalence and characteristics of delusional infestation (DI) among patients with opiate use disorders who also carried a diagnosis of cellulitis.
Methods: A retrospective cross-sectional study was performed in one health system to identify patients with opiate use disorder and cellulitis over the past three years who also described symptoms of DI.
BMJ Case Rep
January 2025
Rheumatology, Epsom and Saint Helier Hospital NHS Trust, Carshalton, UK.
A young lady was brought to the hospital by the police after they found her wandering in the streets far away from her home behaving oddly. At admission, she was confused and had various delusional thoughts accompanied by visual and auditory hallucinations. After she was identified and her old medical notes were retrieved, it was found that she had a diagnosis of systemic lupus erythematosus (SLE) previously for which she declined any treatment.
View Article and Find Full Text PDFBrain
January 2025
Department of Psychiatry (UPK), University of Basel, 4001 Basel, Switzerland.
Perception integrates external sensory signals with internal predictions that reflect prior knowledge about the world. Previous research suggests that this integration is governed by slow alternations between an external mode, driven by sensory signals, and an internal mode, shaped by prior knowledge. Using a double-blind, placebo-controlled, cross-over experiment in healthy human participants, we investigated the effects of the N-Methyl-D-aspartate receptor (NMDAR) antagonist S-ketamine on the balance between external and internal modes.
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