Delusional Misidentification Syndrome Associated with Frontal Lobe Injury : Focusing on Pregnancy Delusion

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  • Meguro Yuko
    Section of Speech Language Therapy & Neuropsychology, Department of Rehabilitation, Tohoku Medical and Pharmaceutical University Hospital.

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  • 前頭葉損傷に伴う妄想性誤認症候群─妊娠妄想を中心に─

Abstract

<p>  Delusions are defined as judgments and beliefs that are difficult to modify. It has been reported that delusions occur during the progression of mental disorders such as dementia, schizophrenia, and depression. In particular, delusional misidentification syndrome (DMS) is a delusion that exhibits identity disorders, such as Capgras syndrome and the Fregoli illusion. It is often observed in right hemisphere injuries and bilateral frontal lobe injuries. It is thought that this is caused by excessive activity of the left frontal lobe and disruption of the reality-monitoring function due to the dysfunction of the right frontal lobe.<br>  In this paper, I reported a case of subarachnoid hemorrhage after clipping surgery for subarachnoid hemorrhage due to rupture of an anterior communicating artery aneurysm with delusions that deceased relatives were still alive and delusions of pregnancy mistaking interoceptive sensations such as anorexia for pregnancy, and considered the mechanism of DMS.</p>

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