Supplementary Figure 1: Units in the pedunculopontine nucleus form two populations based on spike width.
From: Imagined gait modulates neuronal network dynamics in the human pedunculopontine nucleus
a, Autocorrelograms of two exemplar units accepted for analysis, showing refractory period greater than 1 ms. b, Example of a single unit with spike width indicated. The panel on the right shows the histogram of spike widths for all well-isolated units in the PPN. The overall distribution of spike widths was best fit with two Gaussians with means of 168 ± 17 and 226 ± 48 µs (red curves). These two distributions had significant overlap and we separated units into those with narrow-spikes (spike duration < 225 μs) and those with wide-spikes (spike duration > 225 μs).
