Effects of aging on the mechanisms of dynamic integration between the default mode network and other brain networks: evidence based on fMRI data with natural stimulation - Fengzhu Sun; Xinxin Li; Yajun Shi; Qing Jiao; Dong Cui; Jinpeng Niu; Yongxin Guo; Li Dong; Weifang Cao (Brain Imaging and Behavior, 2026)