Institute of Cognitive Neuroscience, Department of Cognitive, Perceptual and Brain Sciences, University College London, London, United Kingdom.
J Neurosci. 2010 Oct 13;30(41):13552-7. doi: 10.1523/JNEUROSCI.0786-10.2010.
Our ability to recognize the emotions of others is a crucial feature of human social cognition. Functional neuroimaging studies indicate that activity in sensorimotor cortices is evoked during the perception of emotion. In the visual domain, right somatosensory cortex activity has been shown to be critical for facial emotion recognition. However, the importance of sensorimotor representations in modalities outside of vision remains unknown. Here we use continuous theta-burst transcranial magnetic stimulation (cTBS) to investigate whether neural activity in the right postcentral gyrus (rPoG) and right lateral premotor cortex (rPM) is involved in nonverbal auditory emotion recognition. Three groups of participants completed same-different tasks on auditory stimuli, discriminating between the emotion expressed and the speakers' identities, before and following cTBS targeted at rPoG, rPM, or the vertex (control site). A task-selective deficit in auditory emotion discrimination was observed. Stimulation to rPoG and rPM resulted in a disruption of participants' abilities to discriminate emotion, but not identity, from vocal signals. These findings suggest that sensorimotor activity may be a modality-independent mechanism which aids emotion discrimination.
我们识别他人情绪的能力是人类社会认知的一个关键特征。功能神经影像学研究表明,在感知情绪时,感觉运动皮层的活动被激发。在视觉领域,已经表明右侧躯体感觉皮层的活动对于面部情绪识别至关重要。然而,在视觉以外的模态中,感觉运动表征的重要性仍然未知。在这里,我们使用连续 theta 爆发经颅磁刺激(cTBS)来研究右侧中央后回(rPoG)和右侧外侧运动前皮层(rPM)的神经活动是否参与非言语听觉情绪识别。三组参与者在 cTBS 靶向 rPoG、rPM 或顶点(对照部位)之前和之后,完成了对听觉刺激的相同-不同任务,区分表达的情绪和说话者的身份。在听觉情绪辨别中观察到任务选择性缺陷。刺激 rPoG 和 rPM 导致参与者辨别声音信号的情绪而不是身份的能力受损。这些发现表明,感觉运动活动可能是一种独立于模态的机制,有助于情绪辨别。