Figure 4.

Plots of instantaneous spike frequency versus time for 10 of the latLFG-PNs included in this study (of a total of 13 latLFG-PNs, all sharing the same enantioselectivity). Representative responses of each projection neuron to antennal stimulation with the mineral oil blank and (–)linalool and (+)linalool at a concentration of 1:1000 are shown. The onset of the 200 msec stimulus is indicated by the vertical dotted line in each column. All latLFG-PNs showed a higher instantaneous spike frequency when the ipsilateral antenna was stimulated with (+)linalool than when it was stimulated with (–)linalool. In several cases (PNs 1, 6, 7, and 10), (–)linalool failed to evoke a response. PNs were numbered in order of ascending peak instantaneous spike frequency.