Figure 7

Capybara AOB microscopic study. (A) Sagittal section stained by Nissl. The laminar organisation is visible and showed at higher magnifications in (B): Inset from (A) Vomeronasal nervous layer (VNL), glomerular layer (GlL), external plexiform layer (EPL), mitral cell layer (MCL), internal plexiform layer (IPL), granular cell layer (GCL), white matter (WM) and subventricular zone (SVZ). (C) Higher magnification of the inset 1 in (D). The Tolivia staining shows the polyhedric morphology of mitral cells (arrowheads). (1) GCL; (2) IPL; (3) MCL; (4) EPL; (5) GlL. (D) Horizontal section of the complete olfactory bulb stained with Tolivia to identify the convergence of myelinic fibres in the lateral olfactory tract (LOT). The differences in size and lamination of MOB and AOB and the arrival of the vomeronasal nerve (VNN) from the medial side of the olfactory bulb are noticeable. (E) Higher magnification of the inset 2 in (D) showing the GlL of the MOB (F) Higher magnification of the inset 3 in (D) showing the GlL of the AOB. a: Anterior; p: posterior; l: lateral; m: medial. Scale bars: (A) 500 µm; (B,C,E,F) 250 µm; (D) 1 mm.