When a patient gets up from sitting position which of the following events takes place in his knee joint?
Physiological locking occurs in extension when the femur is internally (medially) rotated on a fixed tibia.
Locking is a mechanism that allows the knee to remain in the position of full extension as in standing without much muscular efforts and is caused by quadriceps femoris.
Medial rotation of femur on a fixed tibia
Lateral rotation of femur on a fixed tibia
Medial rotation of tibia on a fixed femur
Lateral rotation of tibia on a fixed femur