Beaty Roger E, Cortes Robert A, Zeitlen Daniel C, Weinberger Adam B, Green Adam E
Department of Psychology, Pennsylvania State University, University Park, PA 16801, USA.
Department of Psychology, Georgetown University, Washington, DC 20057, USA.
Cereb Cortex. 2021 Aug 26;31(10):4464-4476. doi: 10.1093/cercor/bhab100.
Creative cognition has been consistently associated with functional connectivity between frontoparietal control and default networks. However, recent research identified distinct connectivity dynamics for subnetworks within the larger frontoparietal system-one subnetwork (FPCNa) shows positive coupling with the default network and another subnetwork (FPCNb) shows negative default coupling-raising questions about how these networks interact during creative cognition. Here we examine frontoparietal subnetwork functional connectivity in a large sample of participants (n = 171) who completed a divergent creative thinking task and a resting-state scan during fMRI. We replicated recent findings on functional connectivity of frontoparietal subnetworks at rest: FPCNa positively correlated with the default network and FPCNb negatively correlated with the default network. Critically, we found that divergent thinking evoked functional connectivity between both frontoparietal subnetworks and the default network, but in different ways. Using community detection, we found that FPCNa regions showed greater coassignment to a default network community. However, FPCNb showed overall stronger functional connectivity with the default network-reflecting a reversal of negative connectivity at rest-and the strength of FPCNb-default network connectivity correlated with individual creative ability. These findings provide novel evidence of a behavioral benefit to the cooperation of typically anticorrelated brain networks.
创造性认知一直与额顶叶控制网络和默认网络之间的功能连接相关。然而，最近的研究发现，在更大的额顶叶系统中，子网络具有不同的连接动态——一个子网络（FPCNa）与默认网络呈正耦合，另一个子网络（FPCNb）与默认网络呈负耦合——这引发了关于这些网络在创造性认知过程中如何相互作用的问题。在这里，我们在一大群参与者（n = 171）中检查额顶叶子网络的功能连接，这些参与者在功能磁共振成像（fMRI）期间完成了一项发散性创造性思维任务和一次静息状态扫描。我们重复了最近关于额顶叶子网络静息状态功能连接的研究结果：FPCNa与默认网络呈正相关，FPCNb与默认网络呈负相关。关键的是，我们发现发散性思维引发了额顶叶两个子网络与默认网络之间的功能连接，但方式不同。通过社区检测，我们发现FPCNa区域与默认网络社区的共分配程度更高。然而，FPCNb与默认网络的功能连接总体上更强——反映出静息状态下负连接的逆转——并且FPCNb与默认网络连接的强度与个体的创造性能力相关。这些发现为通常反相关的脑网络合作带来行为益处提供了新的证据。
