| Title: | Temporal coding of pheromone pulses and trains in Manduca sexta |
| Address: | "INRA, Station de Phytopharmacie, route de Saint Cry, Versailles, France" |
| Abstract: | "We investigated the ability of pheromone-sensitive olfactory receptors of male Manduca sexta to respond to 20-ms pulses of bombykal, the major component of the conspecific pheromonal blend. Isolated pulses of bombykal elicited a burst of activity which decreased exponentially with a time constant of 160-250 ms. Trains of pulses delivered at increasing frequencies (0.5-10 Hz) elicited temporally modulated responses at up to 3 Hz. Concentration of the stimulus (1, 10, 100 ng per odor source) had a marginal effect on the temporal resolution of the receptors. Within a train, the responses to individual pulses remained constant, except for 10-Hz trains (short-term adaptation). A dose-dependent decline of responsiveness was observed during experiments (long-term adaptation). Although individual neurons may not respond faithfully to each pulse of a train, the population of receptors sampled in this study appears to be capable of encoding the onset of odor pulses at frequencies of up to at least 3 Hz" |
| Keywords: | "Adaptation, Physiological/physiology Alkadienes/pharmacology Animals Dose-Response Relationship, Drug Electric Stimulation Electrophysiology Male Moths/*physiology Pheromones/*pharmacology Smell/*physiology Stimulation, Chemical;" |
| Notes: | "MedlineMarion-Poll, F Tobin, T R eng Research Support, U.S. Gov't, P.H.S. Germany 1992/11/01 J Comp Physiol A. 1992 Nov; 171(4):505-12. doi: 10.1007/BF00194583" |
