Heterogeneity and Convergence of Olfactory First-Order Neurons Account for the High Speed and Sensitivity of Second-Order Neurons
Figure 1
Ca2+ imaging shows that each pheromone component activates a single glomerulus in the MGC.
(A) The main pheromone component activates the cumulus only. (B, C) The two secondary components activate two neighboring glomeruli. (D) The blend of the 3 components in the behaviorally most efficient ratio 4∶1∶4 activates the whole MGC. Outlines of antennal lobe (AL), antennal nerve (AN) and the 3 main subdivisions of MGC are shown.