Hypostability in the default mode network and hyperstability in the frontoparietal control network of dynamic functional architecture during rumination
Neuroimage July 29, 2021 Xiao Chen (陈骁), Chao-Gan Yan (严超赣)
Rumination, a repetitive focus on negative thoughts, is linked to distinct patterns of brain network stability. During induced rumination, key default mode network (DMN) regions like the medial prefrontal cortex and parahippocampal gyrus showed decreased stability, while frontoparietal control network (FPCN) regions such as the inferior parietal lobule and dorsolateral prefrontal cortex exhibited increased stability compared to a distraction state. Stability in the medial prefrontal cortex and inferior parietal lobule correlated with individual rumination traits. The findings suggest rumination involves dissociated dynamics: hypostability in the DMN and hyperstability in the FPCN.