Biceps Femoris

Joe Muscolino

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Superficial and deep posterior views of the biceps femoris of the hamstring group. The biceps femoris has two heads: long head and short head. The semitendinosus and semimembranosus have been ghosted in.

The Biceps Femoris is a member of the Hamstring Group, which is composed of the:

  • Semitendinosus
  • Semimembranosus
  • Biceps femoris


The Biceps Femoris has two heads: Long head and Short head.



  • The biceps femoris attaches from the ischial tuberosity (long head) and the linea aspera and lateral supracondylar line of the femur (short head) to the head of the fibula.



  • Flexes the leg at the knee joint.
  • Extends the thigh at the hip joint (long head only).
  • Posteriorly tilts the pelvis at the hip joint (long head only).
  • Laterally rotates the leg at the knee joint.


NOTE: The biceps femoris short head attaches proximally right next to where the gluteus maximus attaches distally.