Niccum N, Speaks C
Dept. of Communication Disorders, University of Minnesota, Minneapolis 55455.
J Clin Exp Neuropsychol. 1991 Jul;13(4):614-28. doi: 10.1080/01688639108401076.
The historical basis for interpretation of the dichotic listening performance of aphasic patients is presented. Most studies agree with respect to outcome; aphasic patients as a group tend to have ear advantages (EAs) that are shifted to the left relative to non-brain-damaged listeners. Studies disagree as to whether this difference reflects a shift toward right hemisphere dominance for language processing or a "contralateral ear lesion effect." Emphasis is placed on the most recent additions to the literature, including discussion of factors that affect the accuracy with which lesions can be localized. The conclusion reached is that variables other than dominance determine the direction of ear advantage for many aphasic listeners.
本文介绍了失语症患者双耳分听表现解释的历史依据。大多数研究在结果方面达成共识；失语症患者作为一个群体，相对于非脑损伤听众，其耳优势（EA）往往向左偏移。对于这种差异是反映语言处理向右侧半球优势转移还是“对侧耳部病变效应”，研究存在分歧。重点放在文献中最新增加的内容上，包括对影响病变定位准确性的因素的讨论。得出的结论是，对于许多失语症听众来说，除优势之外的变量决定了耳优势的方向。
