Figure 5.

The magnitude of the reduction in genioglossus activity (EMGgg) during events differed from patient to patient. A greater reduction in genioglossus activity was independently associated with a greater reduction in drive (top) and a tendency of the genioglossus activity to track drive rather than pressure (drive-vs.-pressure contribution, bottom). Findings were similar when examining the loss of EMGgg in units of percentage baseline (mean pre-event peak EMGgg, left) or in units of percentage maximum (right). Models are described in Table 4. *Top panels show the independent associations between reduction in EMGgg and drive after adjusting for the reduction in esophageal pressure (Pes) and the drive-versus-pressure contribution. Bottom panels show the independent associations between reduction in EMGgg and drive-versus-pressure contribution after adjusting for the reduction in drive and the reduction in Pes.