Piriformis

Not yet rated
based on ratings

Original Author(s): Oliver Jones
Last updated: October 21, 2022
Revisions: 2

Original Author(s): Oliver Jones
Last updated: October 21, 2022
Revisions: 2

format_list_bulletedContents add remove

The piriformis is a muscle of the gluteal region in the lower limb. It is an important landmark which divides the gluteal region into an inferior and superior part.

  • Attachments: Originates from the anterior surface of the sacrum. The fibres travel inferiorly and laterally through the greater sciatic foramen to insert onto the greater trochanter of the femur.
  • Actions: Lateral rotation and abduction of the lower limb.
  • Innervation: Nerve to piriformis.
  • Blood Supply: Superior and inferior gluteal artery

Fig 1 – The deep muscles of the gluteal region.

Fig 2 – The piriformis as an anatomical landmark in the gluteal region.