A hamstring is one of three muscles at the back of the thigh - semitendinosus, semimembranosus or biceps femoris - which work to bend the knee.
Semitendinosus - view from the back of the knee
Semimembranosus - view from the back of the knee
Biceps femoris - view from the back of the knee
The hamstring used in graft construction
The tendon of semitendinosus is commonly harvested and used in hamstrings grafts for cruciate ligament reconstruction.
Synonyms:
Hamstrings
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CLINICAL PUBLICATIONS
Semitendinosus tendon regeneration after anterior cruciate ligament reconstruction: can we use it twice?. Stevanović V, Blagojević Z, Petković A, Glišić M, Sopta J, Nikolić V and Milisavljević M. Int Orthop. 2013 Dec; 37(12): 2475–2481.