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  • Title: Hearing other's pain is associated with sensitivity to physical pain: An ERP study.
    Author: Liu Y, Meng J, Yao M, Ye Q, Fan B, Peng W.
    Journal: Biol Psychol; 2019 Jul; 145():150-158. PubMed ID: 30914209.
    Abstract:
    Numerous studies have demonstrated an overlap between the processing of self-pain and others' pain, which suggests that psychological and neural representations are shared between the perception of physical pain and empathy for pain. As hearing emotional exclamations is a common way in which we regularly perceive and empathize with others' pain, the present study aimed to investigate the link between sensitivity to physical pain and the sounds made by others in pain. We recorded event-related potential (ERP) responses to another person's vocalizations (neutral or painful intonation) and identified electrophysiological responses associated with the processing of painful sounds. Additionally, individual pain sensitivity was characterized by a stimulus-response function that described the relationship between objective stimulus intensity and subjective pain intensity. Results showed that compared with hearing others' neutral sounds, hearing others' sounds of pain elicited more positive frontal-central N1 and N2 responses as well as more positive central-parietal P3 and late positive potential responses. These electrophysiological responses to hearing others' pain replicated electrophysiological responses to observing pictures and video clips of people in pain. Importantly, the neural responses to hearing others in pain were associated with physical pain sensitivity that was indexed by stimulus-response characteristics. The identified link between perception of one's own physical pain and the sounds of others in pain further supports the shared common psychological computations between processing one's own pain and empathizing with others' pain.
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