Significant changes in global efficiency, local efficiency, clustering coefficient, and node strength were found lower in the elderly subjects, but not characteristic path length. In the visual WM task, six network features showed significant changes, including global efficiency, local efficiency, characteristic path length clustering coefficient, assortativity, and node strength, as presented in Figure 4. Compared to the middle-aged group, the elderly group showed decreased network properties in all six significant features. Local efficiency, global efficiency, and clustering coefficient were significant in eyes-open, eyes-closed, and visual WM tasks.
