Fig. 3.

Contrasts of corresponding finger versus face tasks in controls and patients. The finger versus face contrasts for imitation and execution tasks showed activation differences in primary motor cortex that correspond to its rough somatotopic organization in both groups. Finger movements produced greater activity in the knob of the left central sulcus and neighboring areas in the precentral and postcentral sulcus (shown in red) whereas face movements produced greater activity in more ventral areas bilaterally along the central sulcus (shown in green). For observe tasks, finger movements produced greater activation in lateral occipital cortex and middle temporal gyrus, while facial expressions produced higher activity in a large section of visual cortex including medial and lateral occipital areas. There were no group differences for any of the contrasts.