Castro-Caldas A, Guerreiro M, Confraria A
Neurology. 1984 Nov;34(11):1418-22. doi: 10.1212/wnl.34.11.1418.
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.
9例失语症患者在缺血性卒中后的第一个月，在双耳分听单词时出现右耳听失现象；3个月后对他们进行了重新评估。4例患者的右耳听失现象完全恢复；5例患者的异常情况持续存在。恢复的患者CT显示侧脑室额角外侧有一个皮质下病变，而没有Heschl回或膝颞通路的病变；未恢复的患者在这些结构中发现有病变。正如关于皮质下失语症的报道，一种皮质下机制可能解释了双耳分听时对侧耳听失现象。
