Integration of the ‘odor-evoked map’ in the mushroom body |  Sensory neurons expressing the same olfactory receptor (left: blue, red, orange) converge in the antennal lobe where they innervate a single glomerulus (dotted circles). Projection neurons (middle: blue, red, orange) connect individual glomeruli to the mushroom body Kenyon cells (right: white). Each Kenyon cell receives input from a random collection of projection neurons.