FIGURE 4.

(A) Camera lucida drawings of cells in the ventral cochlear nucleus labeled by injection of FluoroGold in the contralateral medial geniculate body. Dendritic labeling was usually very limited, but somatic morphology frequently suggested multiple dendrites. Some cells (e.g., cell #1) appear to be members of the multipolar class, whereas the small size of other somas (e.g., cell #7) suggest that members of the small cell class were also labeled. The cells were drawn from two sections, as shown in the inset. Numbers next to each cell correspond to their location as shown in the inset. Transverse sections. (B) Drawing of a transverse section through the left thalamus showing the spread of a FluoroGold deposit across all subdivisions of the medial geniculate nucleus in the animal from which the cells in part A were drawn. cnr, cochlear nerve root; d, m, s, sg, v, dorsal, medial, shell, suprageniculate and ventral subdivisions of the MG; FG, FluoroGold; grca, granule cell area; sp5, spinal trigeminal tract; VCN, ventral cochlear nucleus.