PDF(Pubmed)
Abstract：
Group forming behaviors are common in many species to overcome environmental challenges. In humans, bonding, trust, group norms, and a shared past increase consolidation of social groups. Being a part of a social group increases resilience to mental stress; conversely, its loss increases vulnerability to depression. However, our knowledge on how social group support affects brain functions is limited. This study observed that default mode network (DMN) activity reduced with the loss of social group support from real-life friends in a challenging social competition. The loss of support induced anterior temporoparietal activity followed by anterior insula and the dorsal attentional network activity. Being a part of a social group and having support provides an environment for high cognitive functioning of the DMN, while the loss of group support acts as a threat signal and activates the anterior temporoparietal junction (TPJ) and insula regions of salience and attentional networks for individual survival.
摘要：
群体形成行为在许多物种中是常见的，以克服环境挑战。在人类中,粘合,信任,团体规范，以及社会团体过去共同增加的巩固。成为社会群体的一部分会增加对精神压力的抵抗力；相反，它的损失增加了抑郁症的脆弱性。然而,我们对社会团体支持如何影响大脑功能的知识是有限的。这项研究观察到，在具有挑战性的社会竞争中，默认模式网络（DMN）活动随着现实生活中朋友的社会群体支持的丧失而减少。失去支持会引起前颞顶活动，然后是前岛岛和背侧注意网络活动。作为社会群体的一部分并获得支持为DMN的高认知功能提供了环境，而团体支持的丧失充当威胁信号，并激活前颞顶交界处（TPJ）和脑岛区域的显着性和注意力网络，以实现个体生存。
