Deconstructing Odorant Identity via Primacy in Dual Networks.

ABSTRACT: In the olfactory system, odor percepts retain their identity despite substantial variations in concentration, timing, and background. We study a novel strategy for encoding intensity-invariant stimulus identity that is based on representing relative rather than absolute values of stimulus features. For example, in what is known as the primacy coding model, odorant identities are represented by the conditions that some odorant receptors are activated more strongly than others. Because, in this scheme, odorant identity depends only on the relative amplitudes of olfactory receptor responses, identity is invariant to changes in both intensity and monotonic nonlinear transformations of its neuronal responses. Here we show that sparse vectors representing odorant mixtures can be recovered in a c

SUBMITTER: Kepple DR 

PROVIDER: S-EPMC7449618 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature