Greater sciatic foramen

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Greater sciatic foramen
Greater sciatic foramen.png
The pelvis showing the greater sciatic foramen in red.
Details
Latin foramen ischiadicum majus
Identifiers
Gray's p.309
Dorlands
/Elsevier
sciatic foramen
TA A03.6.03.008
FMA 17031
Anatomical terminology

The greater sciatic foramen is an opening (foramen) at the back of the human pelvis. It is formed by the sacrotuberous and sacrospinous ligaments. The piriformis muscle passes through the foramen and occupies most of its volume.

Structure[edit]

It is bounded as follows:

Function[edit]

The piriformis, which exits the pelvis through the foramen, occupies most of its volume.

The following structures also exit the pelvis through the greater sciatic foramen:

Location Name Vessels Nerves
Above the Piriformis suprapiriform foramen[1] superior gluteal vessels superior gluteal nerve
Below the Piriformis infrapiriform foramen[1] inferior gluteal vessels
internal pudendal vessels
inferior gluteal nerve
pudendal nerve
sciatic nerve
posterior femoral cutaneous nerve
Nerve to obturator internus
Nerve to quadratus femoris

The foramen contains:[2]

  • 7 nerves:
    • Sciatic Nerve:
    • Superior Gluteal Nerve:
    • Inferior Gluteal Nerve:
    • Pudendal Nerve:
    • Posterior Femoral Cutaneous Nerve
    • Nerve to Quadratus Femoris
    • Nerve to Obturator Internus
  • 3 Vessel Sets:
    • Superior Gluteal Artery & Vein
    • Inferior Gluteal Artery & vein
    • Internal Pudendal Artery & vein
  • 1 Muscle:
    • Piriformis

See also[edit]

This article uses anatomical terminology; for an overview, see anatomical terminology.

References[edit]

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. ^ a b Yokochi, Chihiro; Rohen, Johannes W.. Color Atlas of Anatomy: A Photographic Study of the Human Body. Hagerstown, MD: Lippincott Williams & Wilkins. p. 482. ISBN 0-7817-9013-1. 
  2. ^ http://www.wheelessonline.com/ortho/greater_sciatic_foramen

External links[edit]