Fig. 2. Antennal lobe (AL) of the silkmoth. (A) Confocal image of the AL. In this focal plane, two macroglomerular complex (MGC) compartments – cumulus and toroid – and 12 ordinary glomeruli are visible in the AL. AN, antennal nerve; C, cumulus; Gs, ordinary glomeruli; T, toroid; D, dorsal; L, lateral. Scale bar, 100 µm. (B,C) 3-D reconstruction images of the AL. These images are from two different directions (anterior and posterior). In the anterior image, the toroid and the cumulus are visible. However, the horseshoe (H) is not visible because this compartment resides near the posterior surface. With our optical recording technique, the anterior side of the AL is always oriented toward the MOS-type image sensors.