Figure 8

Scatter plots of the correlation between PBS and gravity (\({\bar{g}}\)). Elevation angle of gravity is here reported against elevation angle (left) and against magnitude of PBS (right) for both prone (blue dots) and supine (orange squares) positioning. As reference, linear fit is superimposed to the data in the case of the statistical correlation between elevation angle of \({\bar{g}}\) in supine and both elevation angle (on the left) and magnitude (on the right) of PBS.