Fig. 3.

NeuN expression in the MD and WT rat at P21. Neurons were stained throughout the caudal brainstem at the level of the area postrema in the wild-type rat (A) and MD rat (B). There appeared to be reduced staining for NeuN in the nucleus tractus solitarius and the hypoglossal nucleus (B, D), which was not significant when quantified (Table 1). Boxed areas in Aand B are enlarged in C andD. Scale bars: A, B, 100 μm; C, D, 50 μm.