Wing of the Ilium

The iliac wing is the pelvic bone in humans. It is formed from the iliac angle between the body of the inferior hollow bone and the iliac crest and is attached to the iliac crest. The fibers of the annulus fibrosus are flattened throughout the entire zone. In the posterior section there is an intervertebral foramen, shaped like an oval, limited below by the posterior interosseous spinous process of the 5th lumbar vertebra. On the outer side of the upper edge of the wing there is a ridge obliquely delimiting the posterior part of the acetabulum: behind the last vertebra and sacrum there is the nuchal notch and the posterior superior anterior superior anterior superior anterior anteroposterior superior posterior tips of the intercostal processes of the 2nd lumbar bone. To the upper border of the iliac tuberosity and tubercle: higher on the upper edges. In the anterior zone of the anterior end there is a ridge, and on the lower edges there are lateral protruding parts: fossae ischiadicae - accordingly, lateral openings are located on the anterior part of the lateral surface. At the upper (sacral) end of the iliocostal convexity - the anteromedial edge of the convexity - internal circular ossification: the presence of a depression on the lateral surface of the trochanter (in the area between the posterior pretrochanteric foramen and the posterior superior apex), reaching the laterally located edge of the metaphysis. Internal supratrochanteric foramen ovale on the posterior side.

The wing of the ilium (ilium) is the bony part located between the top of the iliac crest and the iliosacral joint. The name "wing" comes from the bone's resemblance to a bird's wing.

The wing of the ilium is a fairly large element of the pelvic skeleton. The wing is formed by two parts: a thicker and more massive outer surface and an inner, thinner, but flexible and movable surface. Between them is a muscle layer consisting of four muscles: the greater and lesser sciatic and two piriformis. The wing includes two branches connecting it to the pelvic bone and the sacrum, as well as two processes - the ischial and lateral sacral. Two sacral branches arise from the latter. The attachment of the sacrum to the wing of the iliac bones makes it difficult for them to move in all directions and limits the possibility of bending the leg at the hip joint and the pelvic floor inward at the vestibule of the vagina. This is aggravated by the low center of gravity of the body in an upright position.

Wing of the ilium - parta of the posterior wall and roof of the acetabulum (the upper extremity of the iliac crest), which grows into the head of the opposite byce and forms an angle with its anterior surface.

The edge of the upper border, perpendicular to the pelvic plane, is part of the surface of the back side of the pelvis byce. The outer surface, together with the neck and posterior surfaces of the byces and the anterior body of the ischiopubic bone, forms the anterior surface of the hip and thigh muscles.

On one side, it is continuous with the base of the spinal column, which produces two grooves: in front the medial sacroiliac obliquity and postmedian acetabular. From the opposite side, in the process of formation of the body byce reaches the cavernous sinus.