Biceps femoris
Biceps Femoris
The Biceps Femoris (/baɪˈsɛps ˈfɛmərɪs/; from Latin, meaning "two-headed muscle of the femur"), is a muscle of the thigh located in the posterior (back) compartment. It is part of the hamstrings, a group of three muscles that also includes the semitendinosus and semimembranosus.
Etymology
The term "biceps femoris" comes from the Latin words biceps, meaning "two-headed", and femoris, meaning "of the femur". This name is derived from the muscle's origin from two heads: the long head, which originates from the ischium, and the short head, which originates from the femur.
Function
The biceps femoris performs two main actions: flexion of the knee and extension of the hip. It also contributes to external rotation of the hip and knee when the knee is flexed.
Clinical Significance
Injuries to the biceps femoris, such as strains or tears, are common in athletes, particularly those involved in sports that require sprinting or sudden changes in direction. Treatment typically involves rest, physical therapy, and in severe cases, surgery.
Related Terms
- Hamstrings
- Semitendinosus
- Semimembranosus
- Ischium
- Femur
- Knee flexion
- Hip extension
- External rotation
External links
- Medical encyclopedia article on Biceps femoris
- Wikipedia's article - Biceps femoris
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