| This rise in discharge rate with hypercapnia paralleled the rise in iEMG activity. |
| During a relapse, respiratory muscle weakness can precipitate hypoxemia and hypercapnia of rapid onset. |
| The influence of hypercapnia on tonically discharging motor units is certainly of interest, and future studies are needed. |
| We also computed the number of spikes discharged in each respiratory cycle, at each level of hypercapnia. |
| Narcotics such as morphine, meperidine, fentanyl, and methadone typically cause mild arterial hypercapnia in clinically recommended doses. |
| Baseline ventilation was normal, and the respiratory and cardiovascular responses to hyperoxic hypercapnia were normal in the patients. |
