The Japanese journal of neuropsychology

Full Text of this Article
in Japanese PDF (227K)

ArticleTitle	Mechanism of picture processing in each hemisphere found in a left temporal AVM patient
Language	J
AuthorList	Chiharu Niki, Yoshitaka Ohigashi
Affiliation	Kyoto University
Publication	Japanese Journal of Neuropsychology: 19 (4), 190-199, 2003
Received	Jul 25, 2003
Accepted	Sep 10, 2003
Abstract	To investigate picture processing of each hemisphere in an aphasic patient, two tasks, object decision task (ODT) and priming task were performed. In the experiment 1, the results did not show right visual field advantage of ODT found in healthy subjects in previous study, but demonstrated left visual field advantage in the patient. In the experiment 2, priming effects were found in both hemispheres; priming effect of the right hemisphere same as healthy subjects and that of the left hemisphere inconsistent with healthy subjects. Priming effects of the right hemisphere would reflect visual attributes of objects necessary to identifying nonverbal stimuli, and those of the left hemisphere would result from the disinhibited activation of semantic memory that should be suppressed in the healthy subjects, and for another possibility, it could be caused by the alteration of semantic memory resulted from influence of the right hemisphere.
Keywords	semantic memory, semantic priming effects, hemisphere dominance