Frühholz Sascha, Klaas Hannah S, Patel Sona, Grandjean Didier
Neuroscience of Emotion and Affective Dynamics Laboratory (NEAD), Department of Psychology, University of Geneva, Geneva, Switzerland Swiss Center for Affective Sciences, University of Geneva, Geneva, Switzerland.
Neuroscience of Emotion and Affective Dynamics Laboratory (NEAD), Department of Psychology, University of Geneva, Geneva, Switzerland.
Cereb Cortex. 2015 Sep;25(9):2752-62. doi: 10.1093/cercor/bhu074. Epub 2014 Apr 15.
Although the neural basis for the perception of vocal emotions has been described extensively, the neural basis for the expression of vocal emotions is almost unknown. Here, we asked participants both to repeat and to express high-arousing angry vocalizations to command (i.e., evoked expressions). First, repeated expressions elicited activity in the left middle superior temporal gyrus (STG), pointing to a short auditory memory trace for the repetition of vocal expressions. Evoked expressions activated the left hippocampus, suggesting the retrieval of long-term stored scripts. Secondly, angry compared with neutral expressions elicited activity in the inferior frontal cortex IFC and the dorsal basal ganglia (BG), specifically during evoked expressions. Angry expressions also activated the amygdala and anterior cingulate cortex (ACC), and the latter correlated with pupil size as an indicator of bodily arousal during emotional output behavior. Though uncorrelated, both ACC activity and pupil diameter were also increased during repetition trials indicating increased control demands during the more constraint production type of precisely repeating prosodic intonations. Finally, different acoustic measures of angry expressions were associated with activity in the left STG, bilateral inferior frontal gyrus, and dorsal BG.
尽管对于声音情绪感知的神经基础已有广泛描述，但声音情绪表达的神经基础却几乎无人知晓。在此，我们要求参与者重复并表达高唤醒度的愤怒发声指令（即诱发表达）。首先，重复表达引发了左中颞上回（STG）的活动，这表明存在用于重复声音表达的短暂听觉记忆痕迹。诱发表达激活了左海马体，提示长期存储脚本的提取。其次，与中性表达相比，愤怒表达在诱发表达期间特别激活了额下回（IFC）和背侧基底神经节（BG）。愤怒表达还激活了杏仁核和前扣带回皮质（ACC），并且后者与瞳孔大小相关，作为情绪输出行为期间身体唤醒的指标。尽管两者不相关，但在重复试验期间，ACC活动和瞳孔直径也都增加了，这表明在更具约束性的精确重复韵律语调的产生类型过程中，控制需求增加。最后，愤怒表达的不同声学指标与左STG、双侧额下回和背侧BG的活动相关。
