Semitendinosus       



- Anatomy:
    - origin: ischial tuberosity w/ tendon of biceps femoris;
    - insertion: pes arserinus
    - action:
         - flexes and medially rotates the calf at the knee; extends, adducts and medially rotates the thigh at the hip;
    - reversed origin-insertion action:
         - when leg is fixed, assists posterior stability of the pelvis and extends the pelvis on the hip;
    - nerve supply: sciatic (tibial branch, which develops 2 branches), L4 , L5 S1, S2;
    - synergists: semimembranosus, biceps femoris, gastrocnemius, gracilis, sartorius



Late reconstruction of the patellar tendon.

The semitendinosus: anatomic considerations in tendon harvesting.

The Proximal Origin of the Hamstrings and Surrounding Anatomy Encountered During Repair.  A Cadaveric Study.



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Thursday, December 15, 2011 12:20 pm