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Research Article

Altruistic behaviors relieve physical pain

View ORCID ProfileYilu Wang, View ORCID ProfileJianqiao Ge, View ORCID ProfileHanqi Zhang, View ORCID ProfileHaixia Wang, and View ORCID ProfileXiaofei Xie
PNAS January 14, 2020 117 (2) 950-958; first published December 30, 2019 https://doi.org/10.1073/pnas.1911861117
Yilu Wang
aSchool of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, 100871 Beijing, China;
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  • ORCID record for Yilu Wang
Jianqiao Ge
bCenter for MRI Research, Academy for Advanced Interdisciplinary Studies, Peking University, 100871 Beijing, China;
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Hanqi Zhang
cSchool of Economics and Management, Key Laboratory for Behavioral Economic Science & Technology, South China Normal University, 510006 Guangzhou, China;
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Haixia Wang
dManagement School, Jinan University, 510632 Guangzhou, China
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Xiaofei Xie
aSchool of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, 100871 Beijing, China;
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  • ORCID record for Xiaofei Xie
  • For correspondence: xiaofei@pku.edu.cn
  1. Edited by Susan T. Fiske, Princeton University, Princeton, NJ, and approved December 5, 2019 (received for review July 18, 2019)

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Significance

For centuries, scientists have pondered why people would incur personal costs to help others and the implications for the performers themselves. While most previous studies have suggested that those who perform altruistic actions receive direct or indirect benefits that could compensate for their cost in the future, we offer another take on how this could be understood. We examine how altruistic behaviors may influence the performers’ instant sensation in unpleasant situations, such as physical pain. We find consistent behavioral and neural evidence that in physically threatening situations acting altruistically can relieve painful feelings in human performers. These findings shed light on the psychological and biological mechanisms underlying human prosocial behavior and provide practical insights into pain management.

Abstract

Engaging in altruistic behaviors is costly, but it contributes to the health and well-being of the performer of such behaviors. The present research offers a take on how this paradox can be understood. Across 2 pilot studies and 3 experiments, we showed a pain-relieving effect of performing altruistic behaviors. Acting altruistically relieved not only acutely induced physical pain among healthy adults but also chronic pain among cancer patients. Using functional MRI, we found that after individuals performed altruistic actions brain activity in the dorsal anterior cingulate cortex and bilateral insula in response to a painful shock was significantly reduced. This reduced pain-induced activation in the right insula was mediated by the neural activity in the ventral medial prefrontal cortex (VMPFC), while the activation of the VMPFC was positively correlated with the performer’s experienced meaningfulness from his or her altruistic behavior. Our findings suggest that incurring personal costs to help others may buffer the performers from unpleasant conditions.

  • altruistic behavior
  • physical pain
  • meaningfulness
  • functional MRI

Footnotes

  • ↵1Y.W. and J.G. contributed equally to this work.

  • ↵2To whom correspondence may be addressed. Email: xiaofei{at}pku.edu.cn.
  • Author contributions: J.G., H.W., and X.X. designed research; H.Z. and H.W. performed research; H.W. contributed new reagents/analytic tools; Y.W., J.G., and H.Z. analyzed data; Y.W., J.G., and H.Z. wrote the paper; X.X. led the research team; and X.X. supervised research.

  • The authors declare no competing interest.

  • This article is a PNAS Direct Submission.

  • Data deposition: The data that support the findings of this study and the analysis code have been deposited on Open Science Framework, https://osf.io/5xk73/?view_only=d9912f066d424773bd26c6961eca6890.

  • This article contains supporting information online at https://www.pnas.org/lookup/suppl/doi:10.1073/pnas.1911861117/-/DCSupplemental.

Published under the PNAS license.

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Altruistic behaviors relieve physical pain
Yilu Wang, Jianqiao Ge, Hanqi Zhang, Haixia Wang, Xiaofei Xie
Proceedings of the National Academy of Sciences Jan 2020, 117 (2) 950-958; DOI: 10.1073/pnas.1911861117

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Altruistic behaviors relieve physical pain
Yilu Wang, Jianqiao Ge, Hanqi Zhang, Haixia Wang, Xiaofei Xie
Proceedings of the National Academy of Sciences Jan 2020, 117 (2) 950-958; DOI: 10.1073/pnas.1911861117
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