Journal

The Japanese journal of neuropsychology

[Vol.17 No.4 contents]
Japanese/English

Full Text of this Article
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ArticleTitle A neuropsychological analysis of deficit of the perception of contours in a patient with slowly progressive parietal symptoms
Language J
AuthorList Yuko Den, Yoshitaka Ohigashi
Affiliation Graduate School of Human and Environmental Studies, Kyoto University
Publication Japanese Journal of Neuropsychology: 17 (4), 248-258, 2001
Received Apr 2, 2001
Accepted Aug 31, 2001
Abstract A specific deficit of the perception of contours was observed in a 53-years-old, right-handed patient with slowly progressive parietal symptoms. He had no specific opthalmological problem or any visual cognitive deficits in objects, pictures and line drawings. However, he could not recognize the contour of pictures with incomplete figural elements like a darmachian dog picture. We found that his deficit was due to disability of using visual semantic representation for the object to be perceived in a top-down fashion, suggesting that his disability was related to a particular type of visual agnosia, the perceptual categorization.
Keywords parietal lobe, contour, perceptual categorization, visual cognition

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