Origin/Insertion of Muscles - Hamstrings - Biceps Femoris

The Hamstrings:

There are 3 separate muscles that make up the hamstring group:

• Biceps Femoris
• Semimembranosus
• Semitendinous

The biceps femoris has 2 heads, the long head and short head.

Biceps Femoris (Long Head)
Origin: Ischial tuberosity of os coxa
Insertion: Head of fibula and lateral condyle of tibia
Action: Flexes leg at knee and laterally rotates leg at knee when knee is flexed; also extends thigh at hip

Biceps Femoris (Short Head)
Origin: Distal linea aspera and lateral supracondylar ridge of femur
Insertion: Head of fibula and lateral condyle of tibia
Action: Flexes leg at knee and laterally rotates leg at knee when knee is flexed


  

Ischial Tuberosity

 Lateral Supracondylar Ridge

Lateral Condyle of Tibia