◔
Hamstring Muscles
From WikiMSK
This article is a stub.
| Hamstring Muscles | Origin | Insertion | Action | Nerve roots | Nerves |
|---|---|---|---|---|---|
| Biceps Femoris | long head: medial facet of the ischial tuberosity short head: lateral linea aspera and lateral supracondylar line of the femur and adjacent intermuscular septum | fibular head, crural fascia and lateral tibial condyle (common short and long head tendon) | flexes knee joint
laterally rotates knee joint (when the knee is flexed) extends hip joint (long head only) external rotation of the thigh (long head only) | L5 S1 S2 | long head: Tibial Nerve short head: Common Peroneal Nerve |
| Semimembranosus | Ischial tuberosity | Infraglenoid tubercle of the posterior medial tibial condyle, posterior joint capsule (contributing to the oblique popliteal ligament), popliteal fascia and posterior horn of medial meniscus | Flexes knee joint, medially rotates knee joint (when the knee is flexed beyond 90 degrees), extends hip joint (less than biceps femoris) | L5 S1 S2 | Tibial Nerve |
| Semitendinosus | Ischial tuberosity | As part of the pes anserine tendon, onto the medial superior tibia | flexes knee joint, medially rotates knee joint (when the knee is flexed beyond 90 degrees), extends hip joint (less than biceps femoris) | L5 S1 S2 | Tibial Nerve |
