Inferior pubic ramus

Infobox Bone
Name = Inferior pubic ramus
Latin = ramus inferior ossis pubis
GraySubject = 57
GrayPage = 237

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Caption = Right hip bone. External surface. (Inferior ramus of pubis labeled at bottom right.)

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Caption2 = Pelvis. Inferior ramus is 4c.
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MeshName =
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DorlandsPre = r_02
DorlandsSuf = 12690329
The inferior pubic ramus is thin and flattened. It passes lateralward 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.

urfaces

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

The "medial border" is thick, rough, and everted, especially in females. It presents two ridges, separated by an intervening space.

The ridges extend downward, and are continuous with similar ridges on the inferior ramus of the ischium;
* to the external is attached the fascia of Colles.
* to the internal 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.

ee also

* pubis (bone)

External links

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* (NormanAnatomyFig|pelvislateral)