Semitendinosus

Question 1

What is it?

Answer 1

Medial posterior thigh, superficial to semimembranosus.

Question 2

Origin

Answer 2

The ischial tuberosity

Question 3

Insertion

Answer 3

Proximal, medial shaft of the tibia at the pes anserinus tendon (wraps to anterior aspect 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 the coxal joint.
-Tilt of the pelvis at lumbosacral joint.
-Medially rotate the flexed knee at the tibiofemoral joint; and the hip at the coxal joint.