Semimembranosus

Question 1

What is it?

Answer 1

Medial, posterior thigh; most medial hamstring. M & M.

Question 2

Origin

Answer 2

The ischial tuberosity

Question 3

Insertion

Answer 3

Posterior aspect of the medial condyle of the tibia

Question 4

Innervation

Answer 4

Sciatic nerve (tibial branch).

Question 5

Actions

Answer 5

-Flex the knee at tibiofemoral joint.
-Extend the hip at coxal joint.
-tilt the pelvis posteriorly at the lumbosacral joint.
-Medially rotate the flex Denny at the tibiofemoral joint; & hip at the coxal joint.