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Hip bone

 
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Hip bone is also called inominate bone. It is made up of three separate bones joined together at the acetabulum- ilium, ischium and pubis. The pelvic girdle is formed by the articulation of the two hip bones at the symphysis pubis. It has an inner (medial) surface and a lateral surface.

Ilium

Has an iliac crest which runs from the anterior superior iliac spine to the posterior superior iliac spine. Inferior to the superior spines, we have the inferior spines, which are called

The posterior superior iliac spine is an important landmark in the pelvis for it determines the end of the sacral canal at the level of S2. It is the point of the venus dimple in the female especially.

The iliac crest  is provided with three lips;

These lips provide attachments for muscles of the abdominal wall.

Ilium also has an iliac fossa. At its junction with the pubis in front, it is provided with an eminence called iliopubic eminence.  It articulates with other bones of the hip bone (inominate bone OS INOMINATUM) at the acetabulum.

Pubis

This has a body is placed in front which articulates with the body of the opposite side at the symphysis pubis.

The body has two processes- They are as follows

Superior ramus carries the pubic crest which is provided with a lateral prominence known as the pubic tubercle. It also has a pectineal line which is formed at the so called pecten pubis. The pecten pubis of the superior ramus articulates with the ilium at the iliopubic eminence.

Inferior ramus  provides the pillars for the pubic arch and together with the opposite side forms the subpubic angle of the pelvis. It joins the ischial ramus inferior and together they form the ischiopubic ramus which provides attachments for the adductor magnus.

Ischium

Ischium is provided with a body which articulates  with the ilium and pubis through the ischial ramus. It articulates with other bones of hip at the acetabulum. The body is provided with a single ramus called the ischial ramus.  It also has the ischial spines.

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DIGITAL LOCATOR OF ILIUM: Layer 1, skin of abdomen above the pelvic cavity; Layer 2 of fasciae of anterior abdominal wall; Layer 3 of rectus sheath; Layer 4 of parietal peritoneum and transversalis fascia; Layer 5 of peritoneal pelvic cavity; Layer 6 of pelvic peritoneum and fascia; Layer 7 of greater pelvis; Layer 8 of lesser pelvis; Layer 9 of pelvic floor; Layer 10 of joints and ligaments of pelvis; Layer 11 of bones of pelvis. Ilium is located to layer 11. Roll over mouse to label; click to display page and click the blinking endpage to display ilium page. Ilium in Layer 11 of abdomen

 

 

 

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