Where is ilium located in the body

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Batta, N. Reference article, Radiopaedia. It has an external and internal surface, a crest illiac crest , and an anterior and posterior border. The external surface is smooth and divided by three lines: the posterior, anterior and inferior gluteal lines. The gluteus maximus originates from the external surface adjacent to the posterior gluteal line, the gluteus medius from adjacent to the anterior line, and the gluteus minimus from the inferior line. The internal surface of the ala is smooth and concave and forms the iliac fossa.

The sacrospinalis and multifidus muscles of the back originate in the posterior. In humans, bi-iliac width is an anatomical term referring to the widest measure of the pelvis between the outer edges of the upper iliac bones. The superficial location of the ilium makes it a common site for extracting bone tissue for grafting and bone marrow for transplants. The ilium is located in the pelvic region lateral to the sacrum at the base of the spinal column. Inferior to the ala, the ilium widens into a region known as the body of the ilium.

Between the ala and the body is the greater sciatic notch, a large V-shaped notch in the posterior ilium that allows the sciatic nerve to pass through the pelvis in order to innervate the leg.

The body widens to form the sacroiliac joint on its medial surface and forms cartilaginous joints with the pubis and ischium at the acetabulum.

The acetabulum is the cup-like structure that forms the socket of the hip joint. The surface of the ilium is covered in a thin fibrous membrane known as the periosteum. Quadratus plantae Medically reviewed by the Healthline Medical Network. Depressor labii inferioris Medically reviewed by the Healthline Medical Network.

Quadriceps femoris Medically reviewed by the Healthline Medical Network. Palmaris brevis Medically reviewed by the Healthline Medical Network. Subscapularis Medically reviewed by the Healthline Medical Network. Extensor pollicis longus Medically reviewed by the Healthline Medical Network. Biceps brachii Medically reviewed by the Healthline Medical Network.

Skeletal System Overview.