Fig. 10: Modeling the antennal lobe.
From: Stimulus duration encoding occurs early in the moth olfactory pathway
A Illustration of the used model. B The response end was clearly marked by an inhibitory phase, regardless of the stimulus duration (increasing from top to bottom, 3 ms to 5 s). The y-axis ranges from 0 to 20 Hz. Blue lines show the predicted PN responses. The ORN response is dotted and acts as an input into the AL model. C Although the inhibitory phase clearly marked the response end, the spiking response duration of the PNs still significantly exceeded the stimulus duration for stimuli shorter than 200 ms. D Average firing rates of the simulated PNs in response to stimuli of different durations. Dotted ORN firing rates were used as an input. Note that the ORN input firing rate is not to scale and is normalized to the peak of the PN firing rate for shape comparison. E The raster plots at the top show the spike trains of the 10 PNs in response to the unmodified ORN firing profile (Fast input) and the ORN firing profile smoothed with exponential kernel of 150 ms mean (Slow input). The PNs with the slow input also exhibited the inhibitory phase but did not track the stimulus duration. The full lines in the bottom panel show the PN firing rate averaged over 36 simulations. The dotted lines show the ORN input, rescaled for shape comparison.
