Transient and persistent right ear extinction in dichotic listening: subcortical lesions.
Nine patients with aphasia had right ear extinction in dichotic listening to words in the first month after an ischemic stroke; they were reassessed after 3 months. Four showed complete recovery from the right ear extinction; in five, the abnormality persisted. In those who recovered, CT revealed a subcortical lesion lateral to the frontal horn of the lateral ventricle without a lesion of Heschl's gyrus or geniculo-temporal pathways; a lesion in those structures was found in patients who did not recover. As reported for subcortical aphasia, a subcortical mechanism may explain contralateral ear extinction in dichotic listening.
D000328:Adult; D000368:Aged; D001037:Aphasia / Q000209:etiology; D002540:Cerebral Cortex / Q000000981:diagnostic imaging; D002561:Cerebrovascular Disorders / Q000150:complications* / Q000000981:diagnostic imaging; D004007:Dichotic Listening Tests; D005260:Female; D034381:Hearing Loss / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009434:Neural Pathways; D011859:Radiography