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Case Report
Dementia and Neurocognitive Disorders 2002: 1: 2: 122-126

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A Patient with Amnestic Syndrome and Peduncular Hallucinosis-like Episode Associated with Left Posterior Cerebral Arterial Infarction
Seng-Yun Chung, Seol-Heui Han*, Jeong-Eun Sohn*
Department of Pediatrics, Our Lady of Mercy Hospital, Catholic University College of Medicine, Inchon; Department of Neurology, Chungbuk National University Hospital*, Cheongju, Korea
A Patient with Amnestic Syndrome and Peduncular Hallucinosis-like Episode Associated with Left Posterior Cerebral Arterial Infarction
Seng-Yun Chung, Seol-Heui Han*, Jeong-Eun Sohn*
Department of Pediatrics, Our Lady of Mercy Hospital, Catholic University College of Medicine, Inchon; Department of Neurology, Chungbuk National University Hospital*, Cheongju, Korea
'Peduncular hallucinosis' denotes a psychosensorial disorder consisting of multiple visual colored images of brief duration, which usually occur in the evening or in the dark. Typically, the patient is aware that the images are not real. Most cases of peduncular hallucinosis have been described in association with lesions of vascular nature, including thalamic or brain stem ischemia, vasospasm of the perforating brain stem arteries, and pontine or mesencephalic hemorrhage. We describe a patient who presents vivid hallucinatory episode and subsequently develops various neuropsychologic disturbances including amnestic syndrome. The responsible lesion was a large infarct in the left posterior cerebral arterial territory without any evidence of brainstem involvement.
Key Words: Peduncular hallucinosis, Amnesia, Posterior cerebral arterial infarction