Muscle Anatomy

Biceps Femoris

The biceps femoris, a sizable muscle in the posterior thigh, is part of the hamstring muscle group, contributing to leg movement and stability.

The long head originates from the ischial tuberosity, while the short head arises from the posterior femur. Both heads combine to form the muscle belly.

The biceps femoris inserts into the head of the fibula and the lateral condyle of the tibia, forming part of the common hamstring tendon.

As a biarticular muscle, the biceps femoris plays a vital role in both hip extension and knee flexion. It is active during activities like running and climbing, aiding in the control of leg movement and providing stability to the knee and hip joints. Additionally, it contributes to the overall balance of the lower limb during various dynamic movements.