Biceps Femoris

Biceps Femoris is one of the three muscles which form the hamstring group forming the back of the thigh. The muscle is often described as having a long head (the attachment from the ischium) and a short head (attached to the femur).

Origin

  • Tuberosity of the ischium.  
  • Lower 1/2 of the linea aspera of the femur.  
  • Lateral supracondylar ridge.

Insertion

  • Lateral condyle of the tibia.  
  • Head of the fibula.  

Actions

  • Hip extension.  
  • Knee flexion.
  • Lateral rotation of the hip when the knee is flexed.

Innervation

  • Tibial part of the sciatic nerve.  

Daily uses

  • Bending the knee to step over something.  

Example strengthening exercises

Example stretches

Related injuries

Related muscles