Density of Tbr2+ cells in the dense inner band and diffuse outer band of macaque, ferret and rat.

<p>(<b>a–c</b>) Images taken from coronal sections of E65 macaque, P2 ferret and E20 rat immunostained for Tbr2 (red) and counterstained with DAPI (blue). The dense inner band and diffuse outer band of Tbr2+ cells are indicated. (<b>d–f</b>) Histograms displaying the number of Tbr2+ cells per 2500 µm² in the dense inner band (blue) and diffuse outer band (red) for each species. The diffuse outer band of Tbr2+ cells appears at an early age in macaque in comparison to ferret and rat. In macaque the diffuse outer band was present at E65 during generation of deep layer neurons while the diffuse outer band first appeared at later stages of development in ferret and rat. Nonetheless, the relative density of Tbr2+ cells in the dense and diffuse bands was similar in each species. Scale bar in (<b>a</b>) applies to (<b>a–c</b>).