1. Quantification of pelvic rotation as a determinant of gait
D.Casey Kerrigan, MD, MS, Patrick O. Riley, PhD, Jennifer L. Lelas, MS, Ugo Della Croce, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 82, Issue 2, Pages (February 2001)
DOI: /apmr
Copyright © 2001 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
A modified compass gait model to evaluate the isolated effect of pelvic rotation on reducing the COM vertical displacement. The value b is calculated by using measured values s (step length), r (pelvic rotation contribution), and l (max COM height).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2001 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
Absolute values of pelvic rotation in degrees, averaged from all subjects, is plotted (solid line) over 1 gait cycle with the vertical position of the COM in millimeters (dotted line). The vertical line shows the point where the average COM vertical position was at its lowest, which corresponds closely (on average) to the point where pelvic rotation is at its peak.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2001 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions