Group-level modular structure of healthy young and elderly participants at baseline. A, The group-level modular structure of young participants comprised seven modules. B, The group-level modular structure of elderly participants at baseline comprised eight modules. Modules of both structures resembled known intrinsic connectivity networks. Module labels were assigned based on the network definition by Yeo et al. (2011). Composition of modules for young and elderly participants at baseline is provided in Figure 1-1 and Figure 1-2, respectively. DorsAttn, Dorsal attention; SomMot, somatomotor; SalVentAttn, salience/ventral attention.