- See:
Internal Rotation
- Discussion:
- external-rotation laxity increases w/ knee flexion, w/ largest amount (20 degrees) being
seen in the 30-40-deg range of flexion;
- external rotation is not directly limited by cruciate ligaments;
- only
PCL, which becomes taut at 90 deg of flexion, would be expected
to provide restraint should posterolateral structures be injured;
- external-rotation laxity is markedly increased only when posterolateral structures or
LCL, or both, are cut;
- concomitant loss of
PCL results in greater increases in rotation laxity;
