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Updated: Jan 2 2022

Piriformis

4.3

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(15)

Images
https://upload.orthobullets.com/topic/10073/images/obturator-internus.jpg
  • Summary
      • Piriformis
      • Origin
      • Anterior surface of sacrum and gluteal surface of ilium at the margin of the greater sciatic notch
      • Insertion
      • Superior border of greater trochanter
      • Action
      • External rotator of the hip joint; also helps abduct the hip if it is flexed
      • Innervation
      • Piriformis nerve (L5, S1, S2)
      • Arterial supply
      • Superior and inferior gluteal and internal pudendal arteries
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