Preferred Label : superior ischial ramus;
Uberon definition : The superior ramus of the ischium (descending ramus) projects downward and backward
from the body and presents for examination three surfaces: external, internal, and
posterior. The external surface is quadrilateral in shape. It is bounded above by
a groove which lodges the tendon of the Obturator externus; below, it is continuous
with the inferior ramus; in front it is limited by the posterior margin of the obturator
foramen; behind, a prominent margin separates it from the posterior surface. In front
of this margin the surface gives origin to the Quadratus femoris, and anterior to
this to some of the fibers of origin of the Obturator externus; the lower part of
the surface gives origin to part of the Adductor magnus. The internal surface forms
part of the bony wall of the lesser pelvis. In front it is limited by the posterior
margin of the obturator foramen. Below, it is bounded by a sharp ridge which gives
attachment to a falciform prolongation of the sacrotuberous ligament, and, more anteriorly,
gives origin to the Transversus perinC&i and Ischiocavernosus. Posteriorly the ramus
forms a large swelling, the tuberosity of the ischium;
Uberon related term : superior ramus of ischium;
Origin ID : 0014442;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
The superior ramus of the ischium (descending ramus) projects downward and backward
from the body and presents for examination three surfaces: external, internal, and
posterior. The external surface is quadrilateral in shape. It is bounded above by
a groove which lodges the tendon of the Obturator externus; below, it is continuous
with the inferior ramus; in front it is limited by the posterior margin of the obturator
foramen; behind, a prominent margin separates it from the posterior surface. In front
of this margin the surface gives origin to the Quadratus femoris, and anterior to
this to some of the fibers of origin of the Obturator externus; the lower part of
the surface gives origin to part of the Adductor magnus. The internal surface forms
part of the bony wall of the lesser pelvis. In front it is limited by the posterior
margin of the obturator foramen. Below, it is bounded by a sharp ridge which gives
attachment to a falciform prolongation of the sacrotuberous ligament, and, more anteriorly,
gives origin to the Transversus perinC&i and Ischiocavernosus. Posteriorly the ramus
forms a large swelling, the tuberosity of the ischium
