Speech disturbances due to left precentral cortical lesions |
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Authors: | Naoki Kasahata |
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Affiliation: | 1. Division of Neurology, Department of Medicine, Tokyo Metropolitan Ohtsuka Hospital, Toshima-ku, Japan;2. Department of Neurology, Makita General Hospital, Japan |
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Abstract: | We encountered two patients with lesions predominantly localized to the left precentral cortex who presented with speech disorders. Patient 1 had a lesion localized to the anterior part of the left precentral cortex along the precentral sulcus, in the middle part of the convexity. Patient 1 predominantly exhibited disturbance of prosody. Patient 2 had a lesion localized to the left precentral cortex, located slightly more posterior and more inferior in the convexity. Patient 2 predominantly exhibited disturbance of articulation, with distortion of sounds without apparent inconsistency. Even lesions localized to the left precentral cortex present with various types of speech disturbance. |
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Keywords: | Motor cortex Speech disorder Broca’s aphasia Verbal apraxia |
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