Figure 4. The effect of adaptation on the odour-induced receptor current.

An olfactory receptor cell was exposed to a 4 s adapting pre-pulse at a fixed concentration of 5 μm cineole and immediately thereafter exposed to a 1 s test pulse of increasing concentration as indicated beside each trace. Thick traces represent the responses recorded in the presence of the pre-pulse, while thin traces are control recordings in the absence of the pre-pulse. Current traces were low-pass filtered at 20 Hz and are the means of two trials. Top trace represents the timing of the solution change.