Ischium (bone)

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Bone: Ischium of pelvis
Image:Illu pelvic girdle.jpg
Pelvic girdle
Image:Gray341.png
Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis. (Ischium labeled at bottom left.)
Latin	os ischii
Gray's	subject #57 234
MeSH	Ischium
Dorlands/Elsevier	o_07/12598437

The ischium forms the lower and back part of the hip bone. It is situated below the ilium. The word comes from the Greek ischion, meaning "hip." (Taber's, 1985)

It is divisible into three portions:

[edit] External links

SUNY Labs 44:st-0722 - "The Male Pelvis: Hip Bone"
ischium at eMedicine Dictionary
Cross section at UV pelvis/pelvis-e12-15

[edit] Additional images

Gray235.png Right hip bone. External surface.	Gray236.png Right hip bone. Internal surface.	Gray237.png Plan of ossification of the hip bone.	Gray241.png Male pelvis.
Gray436.png The Obturator externus.	Skeletpelvis-pubis.jpg Pelvis

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

Image:Skeleton woman back.jpg

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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