Table 2. Distribution of Tbr2+ cells during neocortical development.

Macaque age	Total Tbr2+ cells	Radial units	VZ	Tbr2+ dense inner band	Tbr2+ diffuse outer band
E50	267	3	4% (10/267)	93% (248/267)	3% (9/267)
E65	720	3	9% (66/720)	50% (361/720)	41% (293/720)
E80	1213	3	2% (29/1213)	36% (433/1213)	62% (751/1213)
E100	520	3	2% (10/520)	8% (42/520)	90% (468/520)

Tbr2+ cells were counted in a minimum of three 200 µm wide radial units from each age in each species. Radial units stretched from the ventricle to the pial surface in dorsal somatosensory cortex. Numbers represent the average percentage of Tbr2+ cells in each compartment averaged across n radial units. Numbers in parentheses indicate the total number of Tbr2+ cells counted in each compartment at each age.