Updated: 2/12/2018

Piriformis

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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
Action Lateral rotator of the hip joint; also helps abduct the hip if it is flexed
Innervation Piriformis nerve (L5, S1, S2) (L5, S1, S2)
Arterial Supply Superior and inferior gluteal and internal pudendal arteries





 
 

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