Fig. 2.

Appearance of retrograde labeling in preganglionic motoneurons following ciliary ganglion injection (same case as Fig. 1). a–e Rostral to caudal series of low-magnification views to provide context. The boxed areas are shown at higher magnification (f–j). The blue reaction product intensely labels the motoneurons in EWpg. Note that, as one proceeds caudally, the preganglionic motoneurons become more dispersed. Reaction product is also observed within extraocular motoneurons within III and within C-group. Scale in ea–d, j = f–i