Figure 1
From: Neck pain and postural balance among workers with high postural demands - a cross-sectional study
Anterior-posterior position during the perturbation test. A record of the anterior-posterior position of the centre of pressure during the perturbation test. The two vertical bars illustrate the 0-1 s time window after the sudden perturbation in which the perturbation occurs. The vertical arrow shows the size of the displacement (mm) and the horizontal arrow the time to peak displacement (s).