The hamstring muscle group consists of three muscles of the posterior region of the thigh:
- the biceps femoris muscle (long head)
- the semitendinosus muscle
- the semimembranosus muscle.
They are mainly flexors and secondarily leg extensors of the thigh. When walking or running, they are also antagonists quadriceps, slowing the advance of the leg at the end of the step and preventing the brutal and full knee extension.
They fit up on the ischial tuberosity and down on the tibia (Bridle) and the head of the fibula (fibula).
The long head of the biceps femoris and semitendinosus have a common tendon on the posteromedial part of the ischial tuberosity.
The semimembranous has isolated a large tendon that inserts into the ischial tuberosity outside the common tendon and the long head of biceps tendon semi.
Behind this muscle group travels the sciatic nerve.
Doctor Nicolas LEFEVRE, Doctor Serge HERMAN, Doctor Yoann BOHU. – 10 février 2011.