Deep hip

Piriformis

Laterally rotates the extended hip. abducts the flexed hip. and assists stabilization of the femoral head

Origin: Anterior surface of the sacrum
Insertion: Superior border of the greater trochanter of the femur
Primary actions: Laterally rotates the extended hip. abducts the flexed hip. and assists stabilization of the femoral head

Anatomy reference

OpenStax Anatomy and Physiology 2e — Pelvic Girdle and Lower Limbs

Open reference

Educational anatomy reference only. This page does not diagnose pain, injury, or movement limitations.

From anatomy to action

Explore the movement, not just the muscle.

A single muscle rarely explains a movement by itself. Use the related movement content to see how this anatomy may contribute, then choose a focused program when you want a complete progression.

Corrective movement strategies and exercises

Mobility focus

Asymmetric Hip Shift

Explore comfortable left-to-right loading options during standing, squatting, stepping, and walking.

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Mobility focus

Varus Knee (Knee Moving Outward)

Explore foot, knee, and hip strategies that support comfortable squatting, stepping, and single-leg control.

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Mobility focus

Excessive Posterior Pelvic Tilt

Explore comfortable pelvic, hip, and trunk movement without forcing the low back into one preferred curve.

Open corrective movement strategy