Figure 3.

Horseradish peroxidase (HRP) was injected into four distinct neocortical regions in the monkey and the distribution of labelled cells and extracellular granules (shown in coronal sections) in the claustrum was recovered. Note the overlap between claustral zones that communicate with somatosensory cortex (S1) and area four in the precentral gyrus, between claustral regions linked to striate and extrastriate visual cortex (areas 17 and 18) and areas eight and nine of the prefrontal lobe, and between claustral regions that are connected with area four and those connected to areas eight and nine. Modified from Pearson et al. (1982).