Fig. 3

Evolution of acceleration during the PS test on a pathological knee with an anterior cruciate rupture. The Y axis (green) showed the flexion-extension movement induced by the maneuver. The subluxation and abrupt reduction of the anterior compartment of the tibia was highlighted by the abrupt deceleration with point A corresponding to the maximum of the subluxation and point B the reduction. The difference between point A and point B was called the alpha value