臨床神経学

<シンポジウム(1)―9―4>小脳症状とは何か

小脳と構音障害

生井 友紀子

横浜市立大学大学院医学研究科頭頸部生体機能・病態医科学〔〒236―0004 横浜市金沢区福浦3丁目9番地〕

Ataxic dysarthria often refers to disturbance of coordinated articulatory movements in SCD subjects. In our recent study of acoustic analysis of selected speech samples obtained from normal and ataxic subjects, it was revealed that the ataxic speech diagnosed as having "scanning" was characterized by slower speaking rate, inconsistent segment duration of both vowels and consonants, and significant shortening of phonemically long Japanese vowels, as compared to the normal speech. The findings are apparently different from those reported in the study of ataxic speech characteristics of the subjects speaking Germanic languages. Thus, the impression of "scanning" in Japanese ataxic subjects derives mainly from the breakdown of isochrony in terms of difficulty in keeping the length of segments (morae) of Japanese invariable during speech production. The acoustic analysis of selected Japanese sentences is considered to be one of the appropriate methods for objective evaluation of ataxic symptoms.
Full Text of this Article in Japanese PDF (297K)

(臨床神経, 52:997−1000, 2012)
key words:失調性構音,運動障害性構音障害,断綴性発話,日本語文,音響分析

(受付日:2012年5月23日)