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Superior pubic ramus Ramus superior ossis pubis

The superior pubic ramus is a part of the pubis, or pubic bone, one of the three bones that make up the hip bone. It extends upwards, backwards and laterally from the body of the pubic bone to reach the acetabulum. It forms the superior border of the obturator foramen. The superior pubic ramus has three surfaces: a pectineal surface, a pelvic surface and an obturator surface. The pectineal surface faces anteriorly and is tilted slightly upward. This surface extends from the pubic tubercle to the iliopubic eminence and provides attachment for the pectineus muscle. The pelvic surface is posterosuperior and medially inclined and is bounded above by the pectineal line and below by the inferior border. The obturator surface is directed posteroinferiorly and contains the obturator groove, which is a groove for vessels and nerves in the obturator canal. It is bounded anteriorly by the obturator crest and posteriorly by the inferior border.

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