AnatomyDeck

Muscle

Sartorius

Longest muscle in the body

Lower limbMuscular system

High-yield

Longest muscle in the body; flexes hip and knee and laterally rotates the thigh ("tailor's position"). Femoral nerve.

Overview

A strap-like muscle crossing the anterior thigh obliquely that produces the cross-legged 'tailor' position. It forms the lateral border of the femoral triangle.

Reference facts

  • Origin

    Anterior superior iliac spine

  • Insertion

    Superomedial surface of the tibia (pes anserinus)

  • Action

    Flexes, abducts, and laterally rotates the thigh; flexes the knee

  • Innervation

    Femoral nerve (L2, L3)

  • Blood supply

    Femoral artery (muscular branches)

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