Figure 3. Displacement of tissue during the respiratory cycle for the remaining subjects.

Data shown is for the analysis in Fig. 2A. The average motion of point A on the genioglossus starting from end-inspiration for the 5 additional subjects. The respiratory cycle was divided into 6 segments in subject 6, 5 segments in subjects 2 and 5, and 4 segments in subjects 3 and 4. The posterior and anterior motions of the point are represented by negative and positive displacements, respectively. Vertical arrows depict the approximate onset of anterior motion in each subject. The bottom right panel shows mean data superimposed from each subject. The traces are aligned with the onset of apparent anterior motion of genioglossus (vertical arrow) and the gaps between recording segments have been removed. For this panel, data are shown for all subjects and the calibrations are ∼1 mm and ∼40% of the respiratory cycle.