Figure 1

An overview of the basic neuroanatomy of the gustatory system. A cartoon of geniculate neurons innervating the tongue (red) and the palate (green) and petrosal neurons innervating the tongue (blue) are shown innervating peripheral taste bud containing regions and the rostral nucleus of the solitary tract (NST). On the tongue, taste buds are located in fungiform papillae, foliate papillae, and circumvallate papillae (CV). The palate has taste buds on the nasoincisor papilla/ducts (NID) and on the soft palate (circles). Photomicrographs of innervation patterns in the tongue and in the palate at E16.5 are shown next to the appropriate regions. An overlay image of two geniculate ganglia (E14.5) is also shown; one ganglia following DiI-label to the palate was pseudo-colored green, the other following DiI-labeling of the tongue remains red. These two ganglia images were anatomically aligned and superimposed using Adobe Photoshop.