Semimembranosus
Thighs
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Ischial tuberosity
- Insertion
- Back of the medial condyle of the tibia
- Action
- Flexes the knee, extends the hip and medially rotates the leg
- Nerve supply
- Tibial division of the sciatic nerve (L5–S2)
The broad inner hamstring, lying under the semitendinosus. Its flat, membrane-like upper tendon gives it its name.