Figure 1.

Structure of the Drosophila embryonic CNS. (A) Schematic of a sagittal view of the CNS including brain (red) and ventral nerve cord (VNC; blue). Anterior is left and dorsal is top; neuromere names are listed in the text. (B) Horizontal (dorsal) view of three neuromeres of the VNC; anterior is top. The axon scaffold is shown in dark brown with the anterior commissure (AC), posterior commissure (PC), and lateral connectives (LC) indicated in one of the neuromeres. The cell bodies (CB) of the VNC are shown in tan; nerves shown include the intersegmental nerve (ISN) and segmental nerve (SN). The dotted lines represent the location of the CNS midline cells.