Peper M, Irle E
Research Program in Neuropsychology and Neurolinguistics and Department of Psychology, University of Freiburg, Germany.
Brain Lang. 1997 Jun 15;58(2):233-64. doi: 10.1006/brln.1997.1789.
The present study attempts to elucidate whether cerebral brain lesions differentially affect the crossmodal decoding of emotional intonations in semantically meaningless sentences. Forty patients with well-documented lesions and 12 matched hospital controls participated in the study. Twenty-one had left brain damage (LBD: 12 with anterorolandic (anterior) and 9 with retrorolandic-infrasylvian (posterior) lesions); 19 had right brain damage (RBD: 12 anterior, 7 posterior lesions). The decoding of emotion categories was measured using (a) multiple choice of verbal labels and (b) matching one emotional vocalization (joy, fear, sadness, or anger) with two choice facial expressions. Crossmodal dimensional decoding was assessed by matching vocalizations with two facial expressions with regard to emotional valence or arousal. Results indicate that labeling was reduced in all lesion groups as compared to that in controls. Crossmodal categorical recognition was impaired in RBD, whereas LBD performance was comparable to controls. However, in the dimensional decoding task, a reduced recognition of valence in LBD and arousal in RBD was observed. An analysis of localizational subgroups revealed that subjects with left ventral frontal lesions, which in part extended into the adjacent right hemisphere, were predominantly impaired in the crossmodal identification of valence, whereas right temporoparietal lesions affected arousal decoding. Our results suggest that lateralized lesions may differentially affect the crossmodal recognition of dimensional concepts such as valence and arousal.
本研究旨在阐明脑损伤是否会对语义无意义句子中情感语调的跨模态解码产生不同影响。40名有明确损伤记录的患者和12名匹配的医院对照者参与了该研究。其中21人有左脑损伤（LBD：12人有额前叶（前部）损伤，9人有额后叶-颞下沟（后部）损伤）；19人有右脑损伤（RBD：12人前部损伤，7人后部损伤）。情感类别的解码通过以下方式测量：（a）对言语标签进行多项选择，以及（b）将一种情感发声（喜悦、恐惧、悲伤或愤怒）与两种面部表情进行匹配。跨模态维度解码通过将发声与两种关于情感效价或唤醒度的面部表情进行匹配来评估。结果表明，与对照组相比，所有损伤组的标签识别能力均下降。RBD组的跨模态类别识别受损，而LBD组的表现与对照组相当。然而，在维度解码任务中，观察到LBD组对效价的识别能力下降，RBD组对唤醒度的识别能力下降。对定位亚组的分析显示，部分延伸至相邻右半球的左腹侧额叶损伤患者在跨模态效价识别方面主要受损，而右颞顶叶损伤则影响唤醒度解码。我们的结果表明，单侧损伤可能会对效价和唤醒度等维度概念的跨模态识别产生不同影响。
