The semitendinosus is a muscle within the posterior compartment of the thigh. It is situated on the medial aspect of the posterior thigh and superficial to the semimembranosus muscle.
- Attachments: Originates from the ischial tuberosity of the pelvis and attaches to the medial surface of the tibia.
- Actions: Flexion of the leg at the knee joint. Extension of thigh at the hip. Medially rotates the thigh at the hip joint and the leg at the knee joint.
- Innervation: Tibial part of the sciatic nerve.
- Blood Supply: Profunda femoris artery