If a muscle crosses the knee joint posteriorly with a vertical direction to its fibers,what action will it most likely have?
A)flexion of the thigh at the hip joint
B)medial rotation of the leg at the knee joint
C)flexion of the leg at the knee joint
D)extension of the leg at the knee joint

Question

Quizplus · Accepted Answer

Muscles that cross a joint posteriorly and have a vertical fiber direction typically act to flex the joint they cross. In the case of the knee, this means they would contribute to flexion of the leg at the knee joint.

If a Muscle Crosses the Knee Joint Posteriorly with a Vertical