Table 3.

Genioglossus single-motor-unit interspike intervals during negative-pressure pulse stimuli

Subject number and discharge pattern	Pre-stimulus baseline (ms)	First post-stimulus potential (ms)	Second post-stimulus potential (ms)
1 (IT)	57 ± 3	54 ± 5	79 ± 3*†
2 (ET)	51 ± 4	50 ± 3	60 ± 5*
3 (T)	55 ± 2	50 ± 5	84 ± 5*†
4 (IT)	99 ± 3	120 ± 23	112 ± 11*
5 (IT)	44 ± 2	45 ± 2	60 ± 3*†
6 (T)	40 ± 3	41 ± 4	108 ± 7*†
Mean	58 ± 9	60 ± 12	84 ± 9*†

The average interspike interval (ISI) of genioglossus single motor units during six pulse presentations per subject immediately prior to and the first and second potentials after pulse onset, respectively. (See Fig. 2A for an example tracing in one subject). Inspiratory tonic (IT), expiratory tonic (ET) and tonic (T) discharge patterns according the definitions described by Saboisky et al. (2006); see text for further details.

^*Significant difference compared to baseline

^†significant difference compared to first post-stimulus potential.