C'est un muscle fléchisseur de la jambe sur la cuisse. Il permet également la rotation interne de la jambe (mouvement qui amène le pied vers l'intérieur).

Demi tendineux

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The half-membranous is the third muscle of the muscular group of the iliotibial tract. It is attached to the ischium (bone of the pelvis) and ends on the tibial tray (upper part of the tibia, bone of the leg).

It is a flexor muscle of the leg on the thigh. It also permits the internal rotation of the leg (movement that brings the foot inward).