Inferior pubic ramus
| Inferior pubic ramus | |
|---|---|
 Right hip bone. External surface. (Inferior ramus of pubis labeled at bottom right.) | |
 Pelvis. Inferior ramus is 4c. | |
| Details | |
| Identifiers | |
| Latin | Ramus inferior ossis pubis |
| TA | A02.5.01.313 |
| FMA | 16989 |
The inferior pubic ramus is a part of the pelvis and is thin and flat. It passes laterally and downward from the medial end of the superior ramus; it becomes narrower as it descends and joins with the inferior ramus of the ischium below the obturator foramen.
Surfaces
Its anterior surface is rough, for the origin of muscles—the Gracilis along its medial border, a portion of the Obturator externus where it enters into the formation of the obturator foramen, and between these two, the Adductores brevis and magnus, the former being the more medial.
The posterior surface is smooth, and gives origin to the Obturator internus, and, close to the medial margin, to the Constrictor urethrae.
Borders
In the female pelvis, the medial border is thick, rough, and everted, and presents two ridges, separated by an intervening space. The ridges extend downwards, and are continuous with similar ridges on the inferior ramus of the ischium;
- to the external ridge is attached the fascia of Colles
- to the internal ridge is attached the inferior fascia of the urogenital diaphragm
The lateral border is thin and sharp, forms part of the circumference of the obturator foramen, and gives attachment to the obturator membrane.
See also
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
External links
- Cross section image: pelvis/pelvis-e12-15 - Plastination Laboratory at the Medical University of Vienna
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvislateral)
