Transcortical sensory aphasia following left frontal infarction |
| |
Authors: | M Otsuki Yoshiaki Soma Akira Koyama Nahoko Yoshimura Hiroko Furukawa Shoji Tsuji |
| |
Institution: | (1) Department of Neurology, Brain Research Institute, Niigata University, 1 Bancho, Asahimachidori, Niigata 951, Japan Tel.: 81-025-223-6161 (ext. 5183 or 5184), Fax: 81-025-223-3620, JP;(2) Department of Neurology, Kobari Hospital, Japan, JP;(3) Department of Neurology, Takeda General Hospital, Japan, JP;(4) Department of Speech Therapy, Takeda General Hospital, Japan, JP |
| |
Abstract: | Two right-handed patients who exhibited language disability after left frontal infarction are described. The patients spoke
fluently and exhibited excellent repetition ability from the onset of infarction without exhibiting any oral apraxia, but
had deficits in auditory comprehension, naming, reading and writing. In both patients, brain magnetic resonance imaging (MRI)
revealed infarction in the left inferior frontal gyrus, the middle frontal gyrus and the anterior part of the lower precentral
gyrus. Single photon emission computed tomography (SPECT) revealed decreased blood flow in the same regions as those shown
to be infarcted by MRI. The MRI and SPECT findings and the symptoms of these patients suggest that left frontal lesions that
encompass Broca’s area produce fluent aphasia if the posterior part of the left precentral gyrus or motor cortex remains intact
and that lesions anterior to Broca’s area and the middle frontal gyrus produce a deficit in auditory comprehension of single
words as well as sentences.
Received: 14 March 1997 Received in revised form: 29 September 1997 Accepted: 15 October 1997 |
| |
Keywords: | Transcortical sensory aphasia Fluent aphasia Frontal lobe Auditory comprehension Word comprehension |
本文献已被 SpringerLink 等数据库收录! |
|