Fig. 8. (A–J) Desensitization of pheromone responses during long pheromone stimuli. The action potential response to long bombykal (BAL) stimuli became more phasic with increasing stimulus intensity. Peri-stimulus-time-histograms (PSTHs) at a bin width of 10 ms were calculated for action potentials elicited by 1000 ms stimuli of BAL, which are indicated by the broken lines. While phasic–tonic responses occurred at all stimulus intensities, the phasic component was more prominent at high intensities. This indicates the presence of desensitization. Since the sample sizes (N) differed for the individual doses, all y-axes were scaled to 4/3xN. The considerable responses elicited by control stimulations with solvent-loaded filter papers (A) are discussed in the text.