Ischial spine

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Bone: Ischial spine
Capsule of hip-joint (distended). Posterior aspect. (Spine of ischium labeled at upper left.)
Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis. (Spine of ischium labeled at center left.)
Latin	s. ischialis
Gray's	subject #57 235
Dorlands / Elsevier	s_18/12749322

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Overview

From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.

Surfaces

external surface	gives attachment to the Gemellus superior
internal surface	gives atttachment to the Coccygeus, Levator ani, and the pelvic fascia
pointed extremity	the sacrospinous ligament is attached.

Additional images

Right hip bone, external surface, showing the greater and lesser sciatic notches, separated by the ischial spine.

Articulations of pelvis. Anterior view.

External links

• SUNY Labs 41:os-0105 - "The Female Perineum: Osteology"
• SUNY Labs 44:st-0724 - "The Male Pelvis"
• Ischial+spine at eMedicine Dictionary

v • d • e Bones of pelvis/pelvic cavity
General	sacrum, coccyx, hip bone
Ilium	Body (Arcuate line) Wing: gluteal lines (Posterior, Anterior, Inferior) - Fossa - iliac spines (Anterior superior, Anterior inferior, Posterior superior, Posterior inferior) - Crest - Tuberosity
Ischium	Body (Ischial spine, Lesser sciatic notch) - Superior ramus (Tuberosity of the ischium) - Inferior ramus
Pubis	Body - Superior ramus (Pubic tubercle, Pubic crest, Obturator crest) - Inferior ramus (Pectineal line)
Compound	Acetabulum (Acetabular notch) - Iliopubic eminence/Iliopectineal line - Linea terminalis - Ischiopubic ramus/Pubic arch Obturator foramen - Greater sciatic foramen/Greater sciatic notch - Lesser sciatic foramen Lesser pelvis (Pelvic inlet, Pelvic brim, Pelvic outlet) - Greater pelvis

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .