Fig. 2.

Virus-labeled neurons in taste-related areas of the rostral medulla in cases with labeled geniculate and trigeminal ganglion cells. A: Labeled cells are concentrated in the nucleus of the solitary tract (NST; oval outline). Labeled cells are also present in the reticular formation (dashed square) and spinal trigeminal sensory nucleus, including the paratrigeminal islands (dashed circle). B: High-magnification view of labeled cells in the rostral NST concentrated in the rostral central (RC) and rostral lateral (RL) subdivisions. C: The rostral NST from a case different from that depicted in B showing many labeled cells in the lateral (RCL) and medial (RCM) halves of the rostral central subdivision. Fewer labeled cells are present in the rostral lateral (RL) and ventral (V) subdivisions; only two cells are labeled in the medial (M) subdivision. D: Nissl-stained section of the rostral NST, level comparable to that depicted in C. Cytoarchitectonic features include desnsely packed small cells in RC, sparse cellularity in M and RL, larger cells in V (Ganchrow et al., 2007; image from the Allen Brain Atlas, BrainMaps.org, Mus musculus, Nissl, coronal, data set 43, C57-C2a, section m17c). For letters not defined see list of Abbreviations. Scale bars = 100 µm.