Biceps Femoris: Origin, Insertion, Action & Nerve Supply
The biceps femoris muscle has two heads – a long head and a short head.
Biceps Femoris is the most lateral of the muscles in the posterior thigh – the common tendon can be felt laterally at the posterior knee.
Function of the Biceps Femoris
The Main action is flexion at the knee. It also extends the leg at the hip and laterally rotates at the hip and knee.
Nerve Supply of the Biceps Femoris
Long head innervated by tibial part of the sciatic nerve, and the short head is innervated by common fibular part of the sciatic nerve.