1. Adaptations to mass perturbations in transtibial amputees: Kinetic or kinematic invariance? 1 
Ruud W. Selles, PhD, Johannes B. Bussmann, PhD, Lisette M. Klip, MSc, Bregje Speet, MSc, A.J. Van Soest, PhD, Henk J. Stam, MD, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 85, Issue 12, Pages (December 2004)
DOI: /j.apmr

2. Fig 1
Stick figure of the swing phase of subject 1 during the beginning, middle, and end of the swing phase, indicating the definitions of the thigh and knee angle.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

3. Fig 2
Typical example of the (A) knee and (B) and thigh angle during the swing phase for subject 1 during the 5 conditions.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

4. Fig 3
Typical example of the (A) knee and (B) hip torque during the swing phase for subject 1 during the 5 conditions.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )