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Semitendinosus

Other Terms: Semitendinosus muscle, Musculus semitendinosus, Muscle semi-tendineux

Muscle parts

None

Latin name

Musculus semitendinosus

Latin muscle parts

None

Group

Thigh muscle – posterior compartment

Etymology

The English name for this muscle is the half tightly stretched band muscle. The word semitendinosus comes from the Latin word semis meaning “half” and the Latin tendere meaning “to stretch.” The Latin arose from the Greek tenonitis meaning a “tightly stretched band,” which came from the Greek verb teino meaning “to stretch.”

Origin

Medial aspect of the superior part of the ischial tuberosity via a shared tendon with the biceps femoris

Insertion

Medial shaft of the tibia just distal to the medial condyle; attaches slightly distal to the gracilis and posterior to the sartorius

Action

Extension of the hip; flexion of the knee; medial rotator of the semiflexed knee.

Action

Extension of the hip; flexion of the knee; medial rotator of the semiflexed knee.

Nerve supply

Tibial nerve (L5, S1, and S2)

Blood supply

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, and inferior medial genicular branch of the popliteal artery.

Latin

Musculus semitendinosus

French

Muscle semi-tendineux

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