The three major muscles of the hamstrings are the:
• biceps femoris
• semimembranous
• semitendinosus
Some people may say there are 4 muscles in the hamstring because the biceps femoris have a long and short head.
What are the most important facts to know about biceps femoris?
The biceps femoris muscle, located in the posterior portion of the thigh, is composed of a long head that originates from the ischial tuberosity and a short head that originates at the linea aspera of the femur. The biceps femoris inserts at the lateral head of the fibula.
The biceps femoris muscle alongside the semitendinosus and semimembranosus form the hamstrings muscle. These muscles are responsible for thigh extension, knee flexion, and external rotation of both the hip and leg.
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