Table 1.
Pattern of breathing during electromyographic recordings
| Tidal volume | T1 | Inspiratory flow | Ribcage contribution to tidal volume | |
|---|---|---|---|---|
| (l) | (s) | (ls−1) | (%) | |
| Experiment 1 | ||||
| Dorsal external intercostal (3) | 0.71 ± 0.03 | 2.19 ± 0.32 | 0.35 ± 0.03 | 66.2 ± 4.3 |
| Ventral external intercostal (3) | 0.74 ± 0.06 | 2.39 ± 0.39 | 0.34 ± 0.04 | 68.0 ± 3.5 |
| Experiment 2 | ||||
| Dorsal external intercostal (3) | 0.71 ± 0.10 | 2.12 ± 0.29 | 0.36 ± 0.09 | 66.7 ± 4.1 |
| Dorsal external intercostal (5) | 0.76 ± 0.10 | 2.24 ± 0.33 | 0.36 ± 0.07 | 66.6 ± 4.0 |
| Dorsal external intercostal (7) | 0.74 ± 0.07 | 2.29 ± 0.31 | 0.34 ± 0.05 | 67.4 ± 4.6 |
| Experiment 3 | ||||
| Dorsal external intercostal (3) | 0.68 ± 0.03 | 1.92 ± 0.17 | 0.36 ± 0.04 | 65.2 ± 6.7 |
| Parasternal intercostal (3) | 0.74 ± 0.04 | 2.10 ± 0.11 | 0.36 ± 0.03 | 66.4 ± 8.4 |
Values of Expt 1 are means ± s.e.m. for six subjects; values of Expts 2 and 3 are means ± s.e.m. for four subjects. T1, inspiratory time. Numbers in paren theses indicate the interspace recorded from.