In vivo spontaneous multiunit tubercle activity in anesthetized mice. a, Representative traces showing multiunit activity, LFP (100 Hz low-pass filter), and respiration over the course of 2 s. Inhalation in respiratory trace is an upward deflection. The hash marks represent unit responses (spikes). b, Waveform plots for two units (unit 1, top; unit 2, bottom) indicated in a by purple and green hash marks, respectively. c, Interspike interval distributions for units displayed in a and b. Note for each unit there were no spikes with intervals ≤2 ms.