Figure 11.

Simulation of the response to a mixture of an excitatory and an inhibitory odor qualitatively reproduce recent measurements (Su et al., 2011). a, Excitatory response to a puff of a fast odor. Top, Stimulus dynamics; middle, raster plot of the response generated using an LN Poisson model cascade; bottom, corresponding firing rate. The neuron response was simulated using the linear filter and the static nonlinear function estimated for ab3A (Fig. 7d). b, Response to a mixture of a fast excitatory and a slow inhibitory odorant. Response was calculated as above, using a linear combination of the two odors as stimulus. This simulation shows that a slow inhibitor can shorten and sharpen the response of a fast excitatory odor. c, Prolonged response to a puff of slow excitatory odor. d, Biphasic response to the sum of slow excitatory and fast inhibitory odorants.