Fig. 3. Four different types of trichoid sensilla (1-4) characterized by their responses to E12- and Z12-14:OAc. Values showing the number of spikes per 0.5 s (means + s.e.m.) of receptor neurons with large and small spike amplitudes. (A) Responses of large and small spiking neurons housed within sensillum types 1-4 to E12-14:OAc (E12 large and E12 small) and to Z12-14:OAc (Z12 large and Z12 small) at dosages of 10 µg (N=71). ^*, significant difference between responses to E12- and Z12-14:OAc as tested by Mann-Whitney U-test (P<0.05); ns, not significant. (B) Dose-response curves were obtained from sensillum types 1-4 housing large and small spiking neurons responding to E12-14:OAc (E12 large and E12 small) and to Z12-14:OAc (Z12 large and Z12 small). The stimulus was loaded at 100 ng, 1 µg, 10 µg and 100 µg.