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Delusional belief about location ("reduplicative paramnesia").
Cogn Neuropsychiatry
January 2025
Emeritus Wilde Professor of Mental Philosophy, Corpus Christi College, Oxford, UK.
Introduction: People admitted to hospital as inpatients following head injury or stroke sometimes form the delusional belief that they are located somewhere else-often, near or in their home. This delusion was first described by Pick, who named it "reduplicative paramnesia"; we argue instead for the term "location delusion".
Methods: We carried out a literature search and identified 112 cases of location delusion published since Pick's original 1903 case.
Delusional Unreality and Predictive Processing.
Biol Psychiatry Cogn Neurosci Neuroimaging
December 2024
Background: Phenomenological psychopathologists have recently highlighted how people with delusions experience multiple realities (delusional and non-delusional) and have suggested this double bookkeeping cannot be explained via predictive processing. Here, we present data from Kamin blocking and extinction learning that show how predictive processing might, in principle, explain a pervasive sense of dual reality.
Methods: This cross-sectional study involved three participant groups: patients with schizophrenia (SZ; n=42), healthy participants with elevated esoteric beliefs (EEB; clairaudient psychics; n=31), and heathy controls (with neither illness nor significant delusional ideation, n=62).
Towards the DSM-6: The intersection of OCD and psychosis. Expert perspectives on insight in the diagnosis of OCD.
Psychiatry Res
February 2025
Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
In 1994, the DSM-IV added the specifier "with poor insight" to the diagnostic criteria of obsessive-compulsive disorder (OCD). The DSM-5 went one step further and now allows clinicians to diagnose OCD "with absent insight/delusional beliefs," thereby blurring the long-standing distinction between OCD and psychosis. The present study surveyed OCD experts as to their opinions on the insight specifier and the future classification of OCD.
View Article and Find Full Text PDFFrom empiric anti-scabietic treatments to delusional infestation: A case report.
Am J Emerg Med
December 2024
University of Michigan Department of Dermatology, 1500 E. Medical Center Dr, Ann Arbor, MI 48105, United States of America.
Chronic pruritus accounts for approximately 1 % of all physician visits, and providers are often confronted with how to treat patients with pruritus. Scabies is oftentimes a concern by both patients and providers, and anti-scabietic treatments are generally considered safe and effective. However, the pruritus will continue if there is an alternate etiology.
View Article and Find Full Text PDFJealousy's stroke: Othello syndrome following a percheron artery infarct.
Neurocase
October 2024
Faculté de médecine et de pharmacie de Casablanca, Université Hassan II de Casablanca, Casablanca, MA, Morocco.
Article Synopsis
- Othello syndrome is a type of psychosis where individuals wrongly believe their partner is cheating, often tied to psychiatric or neurological issues, including strokes.
- A case study details a 50-year-old woman with no prior psychiatric history who developed these delusions after a bi-thalamic stroke, resulting in severe aggressive behavior.
- The condition underscores the link between strokes and psychiatric symptoms, particularly in the right hemisphere, which can disrupt emotional regulation and lead to dangerous misunderstandings of a partner’s behavior.
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