Olfactory–auditory interactions in olfactory tubercle single units. a, Representative traces showing multiunit activity, LFP (0–100 Hz second-order low-pass filter), and respiration over the course of 4 s relative to stimulus onset. Inhalation in respiratory trace is an upward deflection. Time of stimulus presentation is indicated by the shaded gray box. Data shown are from a single electrode location (same mouse) and reflect events in response to an odor (“ODOR”; top panel), auditory tone (tone icon; middle panel), and simultaneous tone and odor presentation (tone icon and “odor”; bottom panel). Histograms, 100 ms time bins. b, Average evoked response (2 s stim to 2 s prestim), for each tone, odor, and odor-plus-tone stimulus (n = 17 units, 173–184 trials/stimulus). *p < 0.01, tone versus odor; **p < 0.005, tone versus odor plus tone, two-tailed t test. c, LFP power spectrograms of prestim (2 s prestim) and odor-plus-tone (2 s during odor plus tone) LFP activity. Data are from four mice, four trials each. Error bars indicate SEM.