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[Vol.34 No.3 contents]
Japanese/English
Full Text of this Articlein Japanese PDF (724K) |
| ArticleTitle | A model of visual cognition |
| Language | J |
| AuthorList | Kazumi Hirayama |
| Affiliation | Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences |
| Publication | Japanese Journal of Neuropsychology: 34 (3), 227-234, 2018 |
| Received | |
| Accepted | |
| Abstract | Rizzolatti et al. proposed three stream model of visual information processing in man, ie. ventral stream, ventro-dorsal stream, and dorso-dorsal stream. Dorso-dorsal stream directed to the superior parietal lobule and the intraparietal sulcus for processing location movement and shape of the object to control actions toward the object unconsciously. Lesions on the dorso-dorsal stream can produce visuomotor ataxia defective prehension or orienting disability of one's own body. Here I describe two symptoms which are reported for the first time as the results of lesions in the intraparietal sulcus, impairment of direction of saccadic eye movement toward the contralesional sounds and impaired perception of radial optic flow with the focus of expansion located on the contralesional visual field. Features of these symptoms are discussed with reference to the functions of dorso-dorsal stream. |
| Keywords | dorso-dorsal stream, saccadic eye movement, optic flow |
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