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Other Terms: Musculus semimembranosus, Muscle semi-membraneux
Latin muscle parts
Thigh muscle – posterior compartment
The English name for this muscle is the half skin muscle. The word semimembranosus comes from the combined Latin words semis meaning “half” and membrana meaning “skin.” This name describes the fact that about half of the muscle consists of a broad, membranous tendon.
Lateral aspect of the superior part of the ischial tuberosity
Tubercle on the posterior surface of medial condyle of the tibia with slips to the medial and lateral borders of the medial condyle
Extension of the hip; flexion of the knee; medial rotator of the semiflexed knee.
Tibial nerve (L5, S1, and S2)
From proximal to distal, the muscle is supplied by the posterior branch of the obturator artery, the inferior gluteal artery, the perforating branches of the deep femoral artery, direct muscular branches from the popliteal artery, superior and inferior medial genicular branches of the popliteal artery, saphenous branch of the descending genicular artery from the femoral artery, and the anterior tibial recurrent artery.