Cerebral Mechanisms Underlying Auditory Verbal Memory. Positron Emission Tomography Studies.

DOI 21 References
  • Okuda Jiro
    Division of Neuropsychology, Department of Disability Medicine, Tohoku University Graduate School of Medicine

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  • 脳機能画像からみた言語機能への接近　　音声言語記憶の脳内メカニズム　　ポジトロンＣＴを用いた研究
  • —Positron Emission Tomography Studies—
  • ―ポジトロンCTを用いた研究―

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Abstract

Cerebral mechanisms underling auditory verbal memory were investigated using positron emission tomography (PET) with young, normal, right-handed male subjects. When the subjects' regional cerebral blood flow (rCBF) during a word repetition task was compared with that during a control task involving word listening, significant increase in rCBF was observed in the left perisylvian area (Broca's area, supramarginal gyrus and Wernicke's area), the right perisylvian area (superior temporal gyrus), the bilateral primary and supplementary motor areas (SMAs), and the cerebellum. When rCBF while the subjects performed a word repetition task involving mental retention of 10 other words was compared with that during a control consisting of a word repetition task not involving retention of 10 words, significant increase in rCBF was observed in the left peri-perisylvian area (anterior inferior frontal gyrus, middle frontal gyrus, angular gyrus and fusiform gyrus), the right perisylvian area (superior temporal gyrus), the bilateral parahippocampal gyri, SMA, caudate nuclei and the cerebellum. These results suggest that the left perisylvian and peri-perisylvian areas involve different sub-processes in auditory verbal memory, and that the right perisylvian area, SMAs and cerebellum always support the functions of the left cortical areas during verbal activity.

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