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image: Piriformis
Piriformis

Piriformis

 Action :

  • Lateral rotator of the hip joint; also helps abduct the hip if it is flexed.

Origin :

  • Anterior surface of lateral process of sacrum and gluteal surface of ilium at the margin of the greater sciatic notch.

Insertion :

  • Superior border of greater trochanter.

Innervation :

  • Lateral rotator of the hip joint; also helps abduct the hip if it is flexed.

Arterial Supply :

  • Superior and inferior gluteal and internal pudendal arteries.

Depth :

  • Superficial
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