Transcortical sensory aphasia following subcortical infarction in the left inferior frontal area -A case report

• Published in: Japanese Journal of Stroke Vol. 18; no. 5; pp. 415 - 420
• Main Authors: Okuda, Bungo, Tachibana, Hisao, Sugita, Minoru, Kawabata, Keita, Takeda, Masanaka
• Format: Journal Article
• Language: Japanese
• Published: The Japan Stroke Society 1996
• Subjects: 123I-IMP SPECT; inferior frontal gyrus; subcortical infarction; three-dimensional surface display; transcortical sensory aphasia
• ISSN: 0912-0726; 1883-1923
• DOI: 10.3995/jstroke.18.415

We report a right-handed 68-year-old man who showed transcortical sensory aphasia. CT and MRI revealed a subcortical infarct circumferenced under the left inferior frontal gyrus. Although this patient had a lesion limited to the subcortical white matter of the so-called “Broca's area”, 123I-IMP SPECT and three-dimensional surface display of the brain perfusion revealed a broad cortical hypoperfusion in the inferior frontal gyrus extending to the middle and superior frontal gyrus without involvement of the pre-and post-central gyri. Interruption of the subcortico-cortical neural circuits may lead to cortical hypoperfusion and result in transcortical sensory aphasia. Cases of transcortical sensory aphasia following subcotrical lesions are considered to be relatively rare.