Fig. 2. (A) Localization of major brain nuclei in a cross section taken at the caudal part of medulla oblongata. (B) Sham-operated eel, (C) AP-lesioned eel and (D) eel with lesion outside AP. Dotted areas in C and D indicate areas heat-coagulated by electric cautery. Sections are stained with Haematoxylin. Locations of cross sectional planes are shown in Fig. 1. AP, area postrema; NCC, commissural nucleus of Cajal; GVC, glossopharyngeal-vagal motor complex; NSO, spino-occipital motor nucleus; RF, reticular formation. Scale bar, 200 µm.