FIGURE 13.

Photomicrographs of coronal sections through the central gray matter of the tree pangolin spinal cord stained for Nissl (a, b), neuronal nuclear marker (NeuN, c, d), and choline acetyltransferase (ChAT, e, f) from the brachial (level 4 in Figure 2) and crural (level 23 in Figures 2 and 3) regions showing the appearance of lamina 10 of the spinal gray (10Sp). Note the presence of the cholinergic central canal cluster (cccc) at the lateral aspect of Sp10. The architecture of Sp10 is similar throughout the tree pangolin spinal cord. In all images, dorsal is to the top and medial is to the left. Scale bar in (f) = 250 μm and applies to all. See list for abbreviations