The semitendinosus muscle is another of the hamstring muscles. It is a long, band-like muscle on the back of the thigh toward the inside, connecting the ischium to the proximal end of the tibia. It is so named because it becomes tendinous in the middle of the thigh, continuing to its movable end as a long, cord-like tendon. It functions to flex and rotate the leg medially and to extend the thigh.
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