Figure A3.

Trial-averaged firing rate is positively correlated with trial-to-trial variability. For each MC in a given modality and drug preparation, showing the trial-averaged firing rate versus the standard deviation (A and B) or variance (C and D) of firing rate (across trials). With orthonosal stimulation (A); with retronasal stimulation (B). C and D are similar except showing the variance of evoked firing rate. We plot the time average to resolve the many instances with no spiking so that each MC has a single number for the firing rate and a single number for the variance. MC, mitral cell.