Muscle Atlas
Piriformis
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)
Arterial Supply: Superior and inferior gluteal and internal pudendal arteries
The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington. They may not be utilized, reproduced, stored, or transmitted in any form or by any means, electronic or mechanical, or by any information storage or retrieval system, without permission in writing from the University of Washington.
Receiving a license to use these images is generally quite easy, particularly for academic and scholarly purposes. For more information see the Musculoskeletal Atlas Express Licensing Page.
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)
Arterial Supply: Superior and inferior gluteal and internal pudendal arteries
The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington. They may not be utilized, reproduced, stored, or transmitted in any form or by any means, electronic or mechanical, or by any information storage or retrieval system, without permission in writing from the University of Washington.
Receiving a license to use these images is generally quite easy, particularly for academic and scholarly purposes. For more information see the Musculoskeletal Atlas Express Licensing Page.