Fig. 2.

BOLD activation pattern and between-group activity differences.

(I) Conjunction analysis of the neural networks activated by all three higher motor control conditions (‘Free’/‘Intern’/‘Extern’) across all subjects, i.e., n = 24. ROIs used for DCM analysis are highlighted. PFC = prefrontal cortex, PMC = premotor cortex, SMA = supplementary motor area, M1 = primary motor cortex, IPS = intraparietal sulcus. (II) Activity for young (n = 12) and old (n = 12) subjects for each condition separately. (III) Between-group activity differences. Significantly enhanced BOLD activity in old as compared to young individuals for each condition separately. All p < 0.05, family-wise error (FWE) corrected at the cluster level.