Beta oscillations reveal ethnicity ingroup bias in sensorimotor resonance to pain of others

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2015
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Riecansky, Igor
Paul, Nina
Kölble, Sarah
Lamm, Claus
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People evaluate members of their own social group more favorably and empathize more strongly with their ingroup members. Using electroencephalography (EEG), we explored whether resonant responses of sensorimotor cortex to the pain of others are modulated by the ethnicity of these others. White participants watched video clips of ethnic ingroup and outgroup hands, being either penetrated by a needle syringe or touched by a cotton swab, while EEG was recorded. Time-frequency analysis was applied to Laplacian-transformed signals from the sensors overlying sensorimotor cortex in order to assess event-related desynchronization and synchronization (ERD/ERS) of sensorimotor mu (7-12 Hz) and beta (13-30 Hz) rhythms. When watching needle injections, beta ERD was significantly stronger for ingroup compared with outgroup hands. This ethnicity bias was restricted to painful actions, as beta ERD for ingroup and outgroup hands neither differed when observing no-pain videos, nor during presentation of the hands without any treatment. Such vicarious sensorimotor activation could play a role in social interaction by enhancing the understanding of the feelings and reactions of others and hence facilitating behavioral coordination among group members.

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ISO 690RIECANSKY, Igor, Nina PAUL, Sarah KÖLBLE, Stefan STIEGER, Claus LAMM, 2015. Beta oscillations reveal ethnicity ingroup bias in sensorimotor resonance to pain of others. In: Social Cognitive and Affective Neuroscience. 2015, 10(7), pp. 893-901. ISSN 1749-5016. eISSN 1749-5024. Available under: doi: 10.1093/scan/nsu139
BibTex
@article{Riecansky2015oscil-29405,
  year={2015},
  doi={10.1093/scan/nsu139},
  title={Beta oscillations reveal ethnicity ingroup bias in sensorimotor resonance to pain of others},
  number={7},
  volume={10},
  issn={1749-5016},
  journal={Social Cognitive and Affective Neuroscience},
  pages={893--901},
  author={Riecansky, Igor and Paul, Nina and Kölble, Sarah and Stieger, Stefan and Lamm, Claus}
}
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