Table 1.

Distribution and density pattern of CR-, PV-, SOM-, and NPY-ir cells in the dorsal, central, and ventral regions of the claustrum.

	Human			Chimpanzee			Crab-eating macaque
	Dorsal	Central	Ventral	Dorsal	Central	Ventral	Dorsal	Central	Ventral
CR	+	+++	++	+	+++	++	+	+++	++
PV	+	+++	++	+	+++	++	+	+++	++
SOM	+	+	+	–	–	–	+	+	+
NPY	++	++	++	++	++	++	++	++	++

+ Moderate; ++ Numerous; +++ Very numerous.