[Stresses on the patellofemoral joint].
The patello-femoral joint is balanced by 2 tension forces of opposite direction, which are represented by the geometrical position of M. quadriceps femoris and Lig. patellae. The resultant is the vector sum of both forces and is shown by a computer simulation. Its action line runs through the center of rotation and is perpendicular to the articular point, the total torque is zero. At higher degrees of knee flexion, quadriceps tendon contacts the femur and changes direction. This effect has important influence on the amount of the resultant. The articular point of the patella moves from distal to further proximal during flexion.
Lengsfeld
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Anatomisches Institut der Universität zu Köln, BRD.
D003198:Computer Simulation; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008433:Mathematics; D008954:Models, Biological; D013314:Stress, Mechanical
Kräfte am Patellofemoralgelenk.