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Basis Functions for Complex Social Decisions in Dorsomedial Frontal Cortex

Marco K Wittmann, Yongling Lin, Deng Pan, Moritz N Braun, Cormac Dickson, Lisa Spiering, Shuyi Luo, Caroline Harbison, Ayat Abdurahman, Sorcha Hamilton,Nadira S Faber,Nima Khalighinejad,Patricia L Lockwood,Matthew F S Rushworth

Nature(2025)SCI 1区

Department of Experimental Psychology

Cited 0|Views1
Abstract
Navigating social environments is a fundamental challenge for the brain. It has been established that the brain solves this problem, in part, by representing social information in an agent-centric manner; knowledge about others' abilities or attitudes is tagged to individuals such as 'oneself' or the 'other'1-6. This intuitive approach has informed the understanding of key nodes in the social parts of the brain, the dorsomedial prefrontal cortex (dmPFC) and the anterior cingulate cortex (ACC)7-9. However, the patterns or combinations in which individuals might interact with one another is as important as the identities of the individuals. Here, in four studies using functional magnetic resonance imaging, behavioural experiments and a social group decision-making task, we show that the dmPFC and ACC represent the combinatorial possibilities for social interaction afforded by a given situation, and that they do so in a compressed format resembling the basis functions used in spatial, visual and motor domains10-12. The basis functions align with social interaction types, as opposed to individual identities. Our results indicate that there are deep analogies between abstract neural coding schemes in the visual and motor domain and the construction of our sense of social identity.
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要点】:本文发现dmPFC和ACC脑区在处理社会决策时使用类似于空间、视觉和运动领域的基底函数来表示社会交互的组合可能性,而非仅仅是针对个体身份的表征,揭示了大脑在社会信息处理中的深层类比编码机制。

方法】:研究采用功能性磁共振成像(fMRI)、行为实验和社会群体决策任务,结合统计分析方法来探究大脑如何编码社会交互信息。

实验】:通过四个独立的研究,使用特定设计的社交群体决策任务,并采集了fMRI数据。具体的数据集名称未在摘要中提及,但实验结果揭示了dmPFC和ACC在社会交互组合可能性方面的神经编码模式。