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Wu X, Lu X, Zhang H, Bi Y, Gu R, Kong Y, Hu L. Sex difference in trait empathy is encoded in the human anterior insula. Cereb Cortex 2022; 33:5055-5065. [PMID: 36190444 PMCID: PMC10151876 DOI: 10.1093/cercor/bhac398] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/16/2022] [Accepted: 09/11/2022] [Indexed: 01/10/2023] Open
Abstract
Females are considered the more empathic sex. This conventional view, however, has been challenged in the past few decades with mixed findings. These heterogeneous findings could be caused by the fact that empathy is a complex and multifaceted construct. To clarify whether sex differences exist in certain dimensions of empathy and whether they are associated with specific neural bases, this study measured trait empathy using the interpersonal reactivity index (IRI) and collected brain structural and functional magnetic resonance imaging data in a large sample of healthy participants (206 males vs. 302 females). We found that females scored higher in the personal distress (PD) subscale than males, but they were comparable to males in other IRI subscales. Sex difference in PD was encoded by brain structural (e.g. gray matter volume in left anterior insula [AI]) and functional (e.g. resting-state functional connectivity between left AI and temporoparietal junction/inferior frontal gyrus) characteristics. Notably, the relationship between sex and PD was indirect-only and serially mediated by AI-associated structural and functional characteristics. Altogether, our results suggested that sex difference existed in self-oriented affective empathy (i.e. PD) and highlighted the importance of the AI, both structurally and functionally, in mediating the sex difference in trait empathy.
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Affiliation(s)
- Xiao Wu
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing 100101, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuejing Lu
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.,CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China
| | - Huijuan Zhang
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.,CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China
| | - Yanzhi Bi
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.,CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China
| | - Ruolei Gu
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing 100101, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yazhuo Kong
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing 100101, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Hu
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.,CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China
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