Fig. 10.

An example of a tonically discharging phrenic motor with spike triggered averaging performed across entire respiratory cycle (A), only during the inspiratory period (B), or selectively during the expiratory period (C). Sorted waveforms (i.e., spikes) and phrenic neurograms (Phr) are presented in the left column. The right column shows waveform overlay plots and the output of STA of the phrenic neurogram. A short-latency STA peak could be detected regardless of whether the averaging was done across the entire cycle (A) or selectively during the inspiratory (B) and expiratory phases (C).