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Reducing aggressive responses to social exclusion using transcranial direct current stimulation

机译：使用经颅直流电刺激减少对社会排斥的积极反应

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A vast body of research showed that social exclusion can trigger aggression. However, the neural mechanisms involved in regulating aggressive responses to social exclusion are still largely unknown. Transcranial direct current stimulation (tDCS) modulates the excitability of a target region. Building on studies suggesting that activity in the right ventrolateral pre-frontal cortex (rVLPFC) might aid the regulation or inhibition of social exclusion-related distress, we hypothesized that non-invasive brain polarization through tDCS over the rVLPFC would reduce behavioral aggression following social exclusion. Participants were socially excluded or included while they received tDCS or sham stimulation to the rVLPFC. Next, they received an opportunity to aggress. Excluded participants demonstrated cognitive awareness of their inclusionary status, yet tDCS (but not sham stimulation) reduced their behavioral aggression. Excluded participants who received tDCS stimulation were no more aggressive than included participants. tDCS stimulation did not influence socially included participants’ aggression. Our findings provide the first causal test for the role of rVLPFC in modulating aggressive responses to social exclusion. Our findings suggest that modulating activity in a brain area (i.e. the rVLPFC) implicated in self-control and emotion regulation can break the link between social exclusion and aggression.
机译：大量研究表明，社会排斥会引发侵略。但是，参与调节对社会排斥的积极反应的神经机制仍然是未知的。经颅直流电刺激（tDCS）调节目标区域的兴奋性。基于研究表明右腹外侧前额叶皮层（rVLPFC）中的活动可能有助于调节或抑制社交排斥相关的困扰，我们假设通过tDCS而非rVLPFC进行非侵入性大脑极化将减少社交排斥后的行为攻击性。参与者在接受tDCS或假刺激rVLPFC时被社会排斥或包括在内。接下来，他们获得了侵略的机会。被排除的参与者表现出对其包容状态的认知意识，而tDCS（但不是假刺激）降低了他们的行为攻击性。排除了接受tDCS刺激的参与者比包括参与者的攻击性更强。 tDCS刺激并未影响社交参与者的攻击。我们的发现为rVLPFC在调节对社会排斥的积极反应中的作用提供了第一个因果检验。我们的研究结果表明，调节涉及自我控制和情绪调节的大脑区域的活动（即rVLPFC）可以打破社交排斥和侵略之间的联系。

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