Fig. 7. NADPH-diaphorase staining in horizontal sections of the suboesophageal ganglion (SOG). (A–C) Schematic drawings of the SOG in a ventral (A), dorsal (B) and lateral (C) view. For orientation, the cells shown in D–H are indicated by dots in the drawings (D in A, E–H in B). In C, the planes of sectioning for D–H are indicated. Anterior is to the top in all panels. (D) Ventral section with anterior groups of small cells (dashed circles). (E) Lateral anterior cells. (F) Lateral posterior cells. (G) Dorsal anterior medial cells. (H) Prominent neuropilar structures in a mid-ventral plane with the dense posterior -shaped neuropilar region showing fine processes and boutons and the anterior ventral mandibular neuropil (dashed line). N1–N7, nerves 1–7. Scale bars, 100 µm.