A Case of Transcortical Sensory Aphasia Following a Left Frontal Lobe Lesion Involving Broca's Area.

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  • Ｂｒｏｃａ領野を中心とする病変による超皮質性感覚失語の１例

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    We reported a case of fluent aphasia which exhibited certain characteristics of transcortical sensory aphasia (TSA) following a left frontal lobe lesion involving the Broca's area. The patient was a 59-year-old right-handed male. MRI and CT showed the lesion to occupy part of the left second frontal gyrus, the posterior part of the left third frontal gyrus, and the left insula cortex and underlying white matter. Spontaneous speech and repetition were good and articulation was normal. Comprehension of words was preserved but that of sentences was poor. In spite of good oral reading, his reading comprehension was slightly impaired. He showed typical characteristics of TSA. We concluded that this comprehension deficit was caused not only by semantic disturbance but also by syntactic disturbance.<br>    Recently there have been a number of reports in Japan of TSA following a frontal lobe lesion including the Broca's area. We propose that it would be better to divide such TSA cases into three independent groups. The three groups are characterized by (1) echolalia and/or paralalia, (2) severe comprehension deficit and (3) mild comprehension deficit, respectively. The third group features a number of common linguistic aspects : mild comprehension deficit, syntactic disorder, literal paraphasia of Kana writing, and early amelioration. The present case belongs to the third group.

Journal

  • Higher Brain Function Research

    Higher Brain Function Research 16 (4), 322-330, 1996

    Japanese Society of Aphasiology (Renamed as Japan Society for Higher Brain Function)

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