Pure agraphia after infarction in the superior and middle portions of the left precentral gyrus: Dissociation between Kanji and Kana

Publication date: Available online 17 November 2015 Source:Journal of Clinical Neuroscience Author(s): Yoshiko Kurosaki, Ryusaku Hashimoto, Hiroshi Tatsumi, Kazuo Hadano The present study describes a Japanese patient with pure agraphia displaying differential disturbances in processing Kanji (morphogram) and Kana (syllabogram) letters after an infarction in the middle and superior portions of the left precentral gyrus. Kana errors reflected the patient’s difficulty with retrieving both motor and visual letter images, whereas Kanji errors included partial letter stroke omissions or additions. This present case suggests that differences in writing disturbances between Kana and Kanji letters are caused by a differential dependency on letter motor images.
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research