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首页> 美国卫生研究院文献>Human Brain Mapping >Affective and cooperative social interactions modulate effective connectivity within and between the mirror and mentalizing systems
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Affective and cooperative social interactions modulate effective connectivity within and between the mirror and mentalizing systems

机译：情感和合作的社会互动调节了镜像系统和心理系统之间的有效连接

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Decoding the meaning of others’ actions, a crucial step for social cognition, involves different neural mechanisms. While the “mirror” and “mentalizing” systems have been associated with, respectively, the processing of biological actions versus more abstract information, their respective contribution to intention understanding is debated. Processing social interactions seems to recruit both neural systems, with a different weight depending on cues emphasizing either shared action goals or shared mental states. We have previously shown that observing cooperative and affective social interactions elicits stronger activity in key nodes of, respectively, the mirror (left posterior superior temporal sulcus (pSTS), superior parietal cortex (SPL), and ventral/dorsal premotor cortex (vPMC/dPMC)) and mentalizing (ventromedial prefrontal cortex (vmPFC)) systems. To unveil their causal organization, we investigated the effective connectivity underlying the observation of human social interactions expressing increasing cooperativity (involving left pSTS, SPL, and vPMC) versus affectivity (vmPFC) via dynamic causal modeling in 36 healthy human subjects. We found strong evidence for a model including the pSTS and vPMC as input nodes for the observed interactions. The extrinsic connectivity of this model undergoes oppositely valenced modulations, with cooperativity promoting positive modulations of connectivity between pSTS and both SPL (forward) and vPMC (mainly backward), and affectivity promoting reciprocal positive modulations of connectivity between pSTS and vmPFC (mainly backward). Alongside MRI data, such divergent effective connectivity suggests that different dimensions underlying the processing of social interactions recruit distinct, although strongly interconnected, neural pathways associated with, respectively, the bottom–up visuomotor processing of motor intentions, and the top–down attribution of affective/mental states.
机译：解读他人行为的含义（这是社会认知的关键步骤）涉及不同的神经机制。虽然“镜像”和“精神化”系统分别与生物行为的处理和更抽象的信息相关联，但人们仍在争论它们对意图理解的贡献。处理社交互动似乎招募了两个神经系统，其权重取决于强调共同行动目标或共同精神状态的线索。先前我们已经表明，观察合作和情感社交互动会分别在镜子（左后颞上颞沟（pSTS），顶顶皮质（SPL）和腹侧/背前运动皮层（vPMC / dPMC） ））和心理化（前额叶前皮质（vmPFC））系统。为了揭示其因果关系，我们通过动态因果模型在36位健康的人类受试者中调查了人类社交互动观察的有效连通性，这些人类社交互动表示合作能力（涉及左pSTS，SPL和vPMC）与情感（vmPFC）之间的关系不断增强。我们发现了一个强有力的证据，证明了包含pSTS和vPMC作为观察到的相互作用的输入节点的模型。该模型的外部连通性经历相反的价态调制，协同性促进了pSTS与SPL（正向）和vPMC（主要是向后）之间的连通性的正调制，而情感性促进了pSTS与vmPFC（主要是向后）之间的连通性的正向调制。除MRI数据外，这种不同的有效连通性还表明，社交互动处理的不同维度招募了与自下而上的视觉运动处理和情感自上而下的归因分别相关的神经路径，尽管它们之间有着很强的相互联系。 /心理状态。

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