1. Asymmetry of gait initiation in patients with unilateral knee arthritis 
Jean-Michel Viton, MD, Michèle Timsit, MD, Serge Mesure, PhD, Jean Massion, PhD, Jean-Pierre Franceschi, MD, Alain Delarque, MD 
Archives of Physical Medicine and Rehabilitation 
Volume 81, Issue 2, Pages (February 2000)
DOI: /S (00)
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
Gait initiation phases with left leg supporting, right leg moving. Postural phase: standing with both feet on the first force-plate. Monopodal phase: standing on the left leg. Double support phase: while left foot is still on the first force-plate right foot has landed on the second force-plate.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
Displacement of the center of pressure during gait initiation with the left leg supporting and the right leg moving; T1: the center of pressure begins to shift backward and toward the moving leg. T2: onset of the displacement of the right lateral malleolus marker. T3: landing of the right foot. T4: take-off of the left foot.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4. Fig. 3
Force-plate recordings in one patient: (A) Displacement of the center of pressure (CP) in the sagittal (CPy) and frontal (CPx) planes; horizontal lines and vertical arrows indicate how measurement of the peak amplitude of the initial backward and lateral CP shift was performed. (B) Horizontal ground reaction forces (Fy) in the sagittal plane during gait initiation in one patient; the areas under the Fy curve were measured during the postural phase (P1) (stripes) and the monopodal phase (P2) (squares). The integrated values are expressed in Newton-seconds.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

5. Fig. 4
Diagram of a subject standing on the AMTI force-plate, about to initiate gait toward the Kistler force-plate. Sixteen light-reflecting markers are placed on anatomic landmarks. Two pairs of cameras are positioned ahead and on the side of the subject.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

6. Fig. 5
Various phases of gait initiation, left leg supporting: (A) T1, center of pressure (CPx) starts its shift to the right in the frontal plane on force-plate 1 with a simultaneous backward CP shift in the sagittal plane (CPy). (B) T2, first displacement of the right lateral malleolus marker. (C) T3, as the right foot lands recordings on force-plate 2 begin. (A) T4, as take-off from force-plate 1 begins recordings on force-plate 1 stop. (B) Displacement of the left lateral malleolus marker shortly precedes T4. P1, postural phase; P2, monopodal phase; P3, double support phase.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

7. Fig. 6
Comparison of the durations of the postural, monopodal, and double-support phases, and of the total movement duration in patients when the affected limb is supporting (ALS), in patients when the sound limb is supporting (SLS), and in control subjects. *p <.05.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

8. Fig. 7
Comparison of the maximal velocity of the anterior iliac spine marker on the moving side and of the step lengths in patients when the affected limb is supporting (ALS, ■), in patients when the sound limb is supporting (SLS, ■), and in control subjects (□). *p <.05; **p <.01; ***p <.001.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

9. Fig. 8
Comparison of the horizontal ground reaction forces in the sagittal plane (Fy) during the postural phase and the monopodal phase in patients when the affected limb is supporting (ALS, ■), when the sound limb is supporting (SLS, ■), and in control subjects (□) *p <.05; **p <.01; ***p <.001.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (00) )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions