Peduncular hallucinosis due to a small hemorrhage around the substantia nigra: a case report

An 81-year-old female developed peduncular hallucination due to a small hemorrhage around the right substantia nigra is reported. Her hallucination was visual, not accompanying any other type of hallucination. It was vivid, colorful, well described, and recognized as unreal by herself. Different fro...

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Bibliographic Details
Published inNo To Shinkei Vol. 54; no. 5; p. 423
Main Authors Furuta, Tomohisa, Nobutou, Hideo, Nobutou, Fumiko
Format Journal Article
LanguageJapanese
Published Japan 01.05.2002
Subjects
Aged
Cerebral Hemorrhage - complications
Female
Hallucinations - diagnosis
Hallucinations - etiology
Humans
Magnetic Resonance Imaging
Mesencephalon - pathology
Substantia Nigra - pathology
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Summary:An 81-year-old female developed peduncular hallucination due to a small hemorrhage around the right substantia nigra is reported. Her hallucination was visual, not accompanying any other type of hallucination. It was vivid, colorful, well described, and recognized as unreal by herself. Different from most of the previous reports, she had no sleep abnormality and the hallucination occurred in daytime and at night, not relating to eye opening or closing. As the lesion of this case was quite restricted to around the right substantia nigra and not affecting the brainstem reticular formation, we speculate that the hallucination itself was induced by the stimulation of mesocorticolimbic system. The other characteristics of the hallucination such as appearing in evening, occurring with eye closing, and accompanying sleep disturbance might be induced when the brainstem involved more widely.
ISSN:0006-8969