The Japanese journal of neuropsychology

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ArticleTitle	Palinopsia, metamorphosia, and abnormal motion vision following hemorrhagic infarction in the territory of right posterior cerebral artery: a case study
Language	J
AuthorList	Tomoko Chiba, Mutsuko Sato, Ikuo Sato
Affiliation	Department of Neuropsychology, Southern TOHOKU Research Institute for Neuroscience
Publication	Japanese Journal of Neuropsychology: 37 (1), 29-38, 2021
Received	May 25, 2020
Accepted	Oct 29, 2020
Abstract	A case of palinopsia, metamorphosia, and abnormal motion vision caused by right posterior cerebral artery infarction was reported. A-69-year-old right-handed male showed left homonymous hemianopia and various symptoms on vision. For example, when he saw an object, the image of that object persisted in the left visual field after he looked away from it (i.e. palinopsia). His palinopsia continued intermittently for two weeks. Furthermore, he experienced transient metamorphosia. When he saw letters, the letters were perceived larger than that actual size in the left visual field (i.e. hemimacropsia). He also had abnormal motion vision a few times. When he saw people turning left in front of him, he noticed that they were moving faster than actual velocity (i.e. time acceleration phenomenon). Brain MRI revealed hemorrhagic infarction in the territory of right posterior cerebral artery. These symptoms may be associated with an irritative phenomenon resulted from instability and altered cerebral blood flow in the perilesional area.
Keywords	palinopsia, metamorphopsia, motion vision, time acceleration phenomenon