WordNet

remarkable or out of the ordinary in degree or magnitude or effect; "a great crisis"; "had a great stake in the outcome"
a person who has achieved distinction and honor in some field; "he is one of the greats of American music"
of major significance or importance; "a great work of art"; "Einstein was one of the outstanding figures of the 20th centurey" (同)outstanding
relatively large in size or number or extent; larger than others of its kind; "a great juicy steak"; "a great multitude"; "the great auk"; "a great old oak"; "a great ocean liner"; "a great delay"
relating to or caused by or afflicted with sciatica
of or relating to the ischium (or the part of the hipbone containing it); "sciatic nerve"
a natural opening or perforation through a bone or a membranous structure (同)hiatus
greater in size or importance or degree; "for the greater good of the community"; "the greater Antilles"
marine microorganism having a calcareous shell with openings where pseudopods protrude (同)foraminifer

PrepTutorEJDIC

(規模・範囲などが)『大きい』,巨大な / 『多数の』;『多量の』 / 『偉大な』,すぐれた;《the Great》《称号・肩書に用いて》 / (身分・地位などの)高い / 気高い,崇高な / 《名詞の前にのみ用いて》重要な,重大な / 《人を表す名詞の前にのみ用いて》大の,たいへんな / 《話》すてきな,すばらしい / 《名詞的に》《the great》偉大な人たち,重要人物 / とても,すごく / とてもよく(very well) / 大物,花形
座骨の / 座骨神経[痛]の
(骨・植物などの)孔(こう),開口

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/06/14 12:02:57」(JST)

wiki en

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. The greater sciatic foramen is wider in women than in men.

Structure

It is bounded as follows:

anterolaterally by the greater sciatic notch of the ilium
posteromedially by the sacrotuberous ligament
inferiorly by the sacrospinous ligament and the ischial spine
superiorly by the anterior sacroilliac ligament

Function

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

References

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

^ ^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.
^ "Greater Sciatic Foramen - Wheeless' Textbook of Orthopaedics". wheelessonline.com. Retrieved 2016-12-27.

External links

Anatomy photo:41:os-0109 at the SUNY Downstate Medical Center
Greater_sciatic_foramen at the Duke University Health System's Orthopedics program
glutealregion at The Anatomy Lesson by Wesley Norman (Georgetown University) (glutealart, glutealner)

UpToDate Contents

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English Journal

Combined anterior-posterior approach with enlarged sciatic foramen to remove sciatic notch dumbbell-shaped tumors.

Li M1, Li H1, Du Y1,2, Cai Z1, Liao H1, Guo F1, Chen A1, Li F1, Yang C1.
Journal of surgical oncology.J Surg Oncol.2017 Jan 30. doi: 10.1002/jso.24552. [Epub ahead of print]
BACKGROUND AND OBJECTIVES: To explore a new method for resecting huge sciatic notch dumbbell-shaped tumors.METHODS: Preoperative thin-slide scanning magnetic resonance images (MRI) and computerized tomography angiography (CTA) scans were conducted. The images were processed to reconstruct a 3-dimens
PMID 28138989

S2 Alar-iliac Fixation: A Powerful Procedure for the Treatment of Kyphoscoliosis.

Liu Z1, Qiu Y1, Yan H1, Hu ZS1, Zhu F1, Qiao J1, Xu LL1, Wang B1, Yu Y1, Qian BP1, Zhu ZZ1.
Orthopaedic surgery.Orthop Surg.2016 Feb;8(1):81-4. doi: 10.1111/os.12227.
The purpose of this study was to introduce a powerful technique for the treatment of kyphoscoliosis. There are currently multiple techniques for sacropelvic fixation, including trans-iliac bars and iliac and iliosacral screws. Several studies have documented the use of these instrumentation techniqu
PMID 27028385

The sciatic nerve in human cadavers - high division or low formation?

Khan AA1, Asari MA, Pasha MA.
Folia morphologica.Folia Morphol (Warsz).2016;75(3):306-310. doi: 10.5603/FM.a2015.0130. Epub 2015 Dec 29.
Variations of the sciatic nerve have been extensively studied in the past including its relationship with the piriformis muscle and associated clinical conditions like piriformis syndrome and sciatica. In the present study we noticed some interesting variations of the sciatic nerve, which were sligh
PMID 26711654

Japanese Journal

腹腔鏡下修復術を行った坐骨ヘルニアの1例

日本臨床外科学会雑誌 75(11), 3185-3189, 2014
NAID 130005072876

イレウスで発症した坐骨ヘルニアの1例

日本臨床外科学会雑誌 73(3), 720-724, 2012
NAID 130004518222

経絡経穴とその周囲構造物との位置関係に関する解剖学的研究 : 秩辺穴の周囲構造物と坐骨神経に対する刺鍼部位について

全日本鍼灸学会雑誌 60(5), 811-818, 2010-11-01
NAID 10031188711

「大坐骨孔」

Greater sciatic foramen
	The pelvis showing the greater sciatic foramen in red.
Details
Identifiers
Latin	foramen ischiadicum majus
Dorlands; /Elsevier	sciatic foramen
TA	A03.6.03.008
FMA	17031
	Anatomical terminology [edit on Wikidata]