Table 2.
Averaged EMG levels observed in both OSA patients and healthy subjects, awake and before arousal during induced flow limitation, in the four accessory dilators studied. Differences between muscles in both tonic and peak activity, awake and asleep, were not statistically significant. Average peak activity triggered by flow limitation was slightly higher than during wakefulness, but this increase reached significance only for the SH.
| GH (n = 9) | SG (n = 7) | SH (n = 7) | SCM (n = 9) | ||
|---|---|---|---|---|---|
| awake | tonic | 4.1 ± 2.5 | 6.0 ± 2.6 | 3.1 ± 1.4 | 3.3 ± 1.2 |
| Peak inspiratory | 4.2 ± 2.5 | 6.7 ± 2.9 | 3.5 ± 1.1 | 3.4 ± 1.0 | |
| sleep | tonic | 3.8 ± 1.7 | 7.7 ± 8.9 | 4.8 ± 2.9 | 3.3 ± 1.2 |
| Peak inspiratory | 4.6 ± 2.1 | 8.9 ± 5.6 | 7.5 ± 4.11 | 4.4 ± 1.32 |
Data are presented as %max, mean ± SD.
GH – geniohyoid; SG – styloglossus; SH – stylohyoid; SCM – sterno-cleido mastoid.
1
p < 0.05 for the comparison of peak SH, awake vs. sleep.
2
p = 0.052 for the comparison of peak SCM awake vs. sleep.