Figure 4.

Adaptation of the pulse response at one odor pulse intensity (10⁻⁴) (A) ORN LFP pulse response averaged across trials (N = 4–11 trials) and cells (N = 5–6 cells). The pulse response was calculated by subtracting the background activity in the 5 sec preceding the pulse. (B) The peak of the pulse response in each cell in the absence (X‐axis) and presence (Y‐axis) of the background odor shows that there is significant adaptation only for the two highest concentrations. Error bars are not shown for clarity. (C) The peak of a cell's pulse response in the presence of a background odor divided by its peak in the absence, averaged across all cells. Error bars are Standard error of the means (SEMs). Asterisks indicate significant adaptation between paired data in panel B (P < 0.05 in a paired t‐test) for a given background odor intensity. (D‐F) As in A‐C, but using ORN spike rate data (N = 4–11 trials and 5–6 cells). Lines show interpolated fits from panels C and F. G‐I, As in A‐C, but using PN synaptic potential data (N = 3–10 trials and 5–7 cells). J‐L, As in A‐C, but using PN spike rate data (N = 3–10 trials and 5–7 cells). Lines show interpolated fits from panels I and L.