Figure 8.

Connectivity of pmCSv with the somatosensory and motor cortices. (A) Somatosensory areas 2, 1 and 3 lie along the postcentral gyrus and the posterior bank of the central sulcus (cs), while the motor area F1 occupies the anterior bank of the cs and the precentral gyrus. Both the somatosensory and motor cortices have a roughly similar somatotopic organization, from the feet/hindlimbs medially to the head laterally, passing by the trunk and forelimbs in-between. Maps of structural and functional connectivity between these regions and pmCSv are shown on the left, on inflated representations of the F99 monkey’s right cortical surface. These maps were normalized and averaged to produce a map of overall connectivity strength, displayed on the right. Thus, connectivity is the strongest for the hindlimbs, intermediate for the trunk/forelimbs and virtually absent for the head. Note that among the somatosensory areas, area 3 is the most strongly connected with pmCSv. (B) Strength of structural (in red) and functional (in green) connectivity in the medial (1), intermediate (2) and lateral (3) sectors of somesthetic areas 1/2/3 (pale colors) and motor F1 area (dark color). Bars and error bars indicate the means and related 95% CI across the 6 ipsilateral and 6 contralateral hemispheres. Stars signal significant structural and functional connectivity with respect to the V1/V2/V3 baseline.