Departamento de Psicobiología, Facultat de Psicologia, València, Spain.
Brain Cogn. 2011 Jul;76(2):294-9. doi: 10.1016/j.bandc.2011.03.003. Epub 2011 Apr 8.
Dichotic Listening (DL) is a valuable tool to study emotional brain lateralization. Regarding the perception of sadness and anger through affective prosody, the main finding has been a left ear advantage (LEA) for the sad but contradictory data for the anger prosody. Regarding an induced mood in the laboratory, its consequences upon DL were a diminished right ear advantage (REA) for the induction of sadness and an increased REA for the induction of anger. The global results fit with the approach-withdrawal motivational model of emotional processing, pointing to sadness as a right hemisphere emotion but anger processed bilaterally or even in the left hemisphere, depending on the subject's preferred mode of expression. On the other hand, the study of DL in clinically depressed patients found an abnormally larger REA in verbal DL tasks which was predictive of therapeutic pharmacological response. However, the mobilization of the available left hemisphere resources in these responders (reflected in a higher REA) would indicate a remission of the episode but would not assure the absence of new relapses.
两耳分听（DL）是研究情绪大脑侧化的一种有效工具。在通过情感韵律感知悲伤和愤怒方面，主要发现是悲伤的左耳优势（LEA），而愤怒韵律则存在矛盾的数据。关于在实验室中诱发情绪，其对 DL 的后果是诱导悲伤时右耳优势（REA）降低，诱导愤怒时 REA 增加。总体结果符合情绪处理的趋近-回避动机模型，表明悲伤是右半球的情绪，但愤怒则双侧处理，甚至在左侧半球处理，这取决于受试者偏爱的表达模式。另一方面，对临床抑郁症患者的 DL 研究发现，在言语 DL 任务中出现异常大的 REA，这可以预测治疗药物反应。然而，这些反应者（反映在更高的 REA 中）可用的左侧大脑资源的调动表明发作的缓解，但不能保证没有新的复发。
