Fig. 1. Diagrammatic cross-section of an adult worm showing the position of neuronal cell bodies and axons relative to other structures in C. elegans. The upper panel is a schematic diagram of the complete nervous system of C. elegans (including the position of individual neuronal cell bodies examined in this paper) and the lower panels show cross-sections of two regions in the body examined in this paper, the lateral ganglia in the head region and the VNC.