Sartorius

Musculus sartorius

Lower Body Lower BodyHip FlexorsAnterior Compartment of the ThighLegs

The sartorius is the longest muscle in the human body, a thin strap running diagonally across the thigh that flexes, abducts, and externally rotates the hip while also flexing the knee. It produces the cross-legged ‘tailor’s’ position and assists in many compound lower-body and rotational movements. It joins the gracilis and semitendinosus in the pes anserinus at the medial knee.

Actions

Hip flexion, Hip abduction, Hip external rotation, Knee flexion, Knee internal rotation (flexed knee)

Origin

Anterior superior iliac spine and the notch just below it

Insertion

Superomedial surface of the proximal tibia via the pes anserinus

Innervation

Femoral nerve (L2-L3)

Blood supply

Femoral artery and lateral circumflex femoral artery

Wikipedia ↗

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