The primacy model and the structure of olfactory space
Fig 3
Suggested feedforward circuit which can process the primacy information.
A. Left: Primacy hull for D = 2 and p = 2; a, b, c, d are discriminable odor identities. Right: connectivity between ORs 1, 2, …5 and cortical cells (insect mushroom body cells) corresponding to different odor identities. The glomeruli from the same primacy sets converge to the same cortical cells. B. The same for D = 3 and p = 3. Only two example simplexes are shown. C. Subprime connectivity model. Individual cortical cells represent the faces of primacy simplexes (sides of the triangles). Individual odor identities are encoded by populations of neurons marked ‘a’ and ‘b’.