Body of ischium
| Body of ischium | |
|---|---|
 | |
| Right hip bone. External surface. (Ischium is at bottom left.) | |
 | |
| Capsule of hip-joint (distended). Posterior aspect. | |
| Latin | Corpus ossis ischii |
| Gray's | p.235 |
The body of the ischium along with the superior and inferior rami makes up the ischium.
The body enters into and constitutes a little more than two-fifths of the acetabulum.
Surfaces
Its external surface forms part of the lunate surface of the acetabulum and a portion of the acetabular fossa.
Its internal surface is part of the wall of the lesser pelvis; it gives origin to some fibers of the Obturator internus.
Borders
Its anterior border projects as the posterior obturator tubercle.
From its posterior border there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.
Above and below the spine
Above the spine is a large notch, the greater sciatic notch.
Below the spine is a smaller notch, the lesser sciatic notch.
Muscle Attachment
Two muslces; the deep[1] and superficial transverse perinei muscles, originates from the body of ischium. No muscles do insert on the body.
Additional images
-
Right hip bone. Internal surface.
-
Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis.
External links
- 44:st-0723 at the SUNY Downstate Medical Center - "The Male Pelvis: Hip Bone"
References
This article incorporates text from a public domain edition of Gray's Anatomy.
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