Fig. 5.

Increased neural activity associated with planning grasping actions with the hands or the tool relative to resting baseline. Selecting grips (PGS task) based on either hand or on the tool was consistently associated with activations within left aIPS and PMv, the putative homologs of the macaque AIP-F5 grasp circuit. In addition, activity was increased within and along the intra-parietal sulcus, as well as in bilateral superior parietal lobule (SPL) and dorsal premotor cortex (PMd), and in pre-SMA. Other structures were also activated only in some conditions, such as the right aIPS and the left middle frontal gyrus (MFG). (Jacobs et al., 2009)