The Japanese journal of neuropsychology

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ArticleTitle	A case study of Parkinson's Disease Psychosis showing feeling of presence and visual hallucination in different symptom courses
Language	J
AuthorList	Chihiro Hasegawa¹⁾, Tomoko Saito²⁾, Chitoku Miwa¹⁾, Nobutsugu Hirono¹⁾
Affiliation	¹⁾Kobe Gakuin University, Department of Psychology ²⁾Osaka Toneyama Medical Center, Department of Neurology
Publication	Japanese Journal of Neuropsychology: 39 (2), 165-174, 2023
Received	Jul 23, 2022
Accepted	Feb 21, 2023
Abstract	The diagnostic criteria by Parkinson's Disease by the NINDS-NIMH Work Group proposes delusions, hallucinations, false sense of presence, and illusions as characteristic symptoms in Parkinson's Disease Psychosis (PDPsy). Feeling of presence (FP) is vivid sensation that somebody, who does not actually exist, is present without real sensation such as hearing, sight, or other perceptual elements. In this article we reported a case of an 83-year-old woman who had visual hallucination and FP from the early stages of disease, and they had followed different symptom courses. It could be suggested that partially different neural base from visual hallucinations might be involved in FP of PDPsy.
Keywords	feeling of presence, Parkinson's disease psychosis, visual hallucination