Fig. 4.

The right inferior frontal gyrus (BA 44) as well as the right temporo-parietal junction (Area PF) show increasing activity when contrasting unilateral conditions with fixed and respectively jittered timing. The activated temporo-parietal region (60/−38/15) overlaps with the region activated when contrasting conditions with respectively unilateral and random hand movements (Fig. 3). No region was associated with reduced timing uncertainty.