Sartorius

Region: Hip & Thigh Muscles · All hip & thigh muscles

Sartorius at a glance

OriginAnterior superior iliac spine
InsertionUpper medial surface of the tibia (pes anserinus)
ActionsFlexes the thigh and the knee; Moves the thigh outward and rotates it outward (sitting cross-legged)
Nerve supplyFemoral nerve (L2–L3)

◆ Good to know

The longest muscle in the body, named for tailors (sartor) who sat cross-legged; it forms the lateral border of the femoral triangle.

Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.