In bipedal mammals, the iliac crests are parallel to the vertically oriented sacroiliac joints, where in quadrupedal mammals they are parallel to the horizontally oriented sacroiliac joints.
22.
In the donation process, the marrow is removed through a hollow surgical needle inserted several times into the iliac crest ( back of the pelvic bone ).
23.
A " standard " length corset will stop short of the iliac crest and is ideal for those who want increased flexibility or have a shorter torso.
24.
It is formed of longitudinal and transverse fibers that bridge the aponeuroses of internal oblique and costal angles and iliac crest laterally, to the vertebral column and sacrum medially.
25.
The ilioinguinal nerve then perforates the transversus abdominis near the anterior part of the iliac crest, and communicates with the iliohypogastric nerve between the transversus and the internal oblique muscle.
26.
The shape of the pelvis, most notably the orientation of the iliac crests and shape and depth of the acetabula, reflects the style of locomotion and body mass of an animal.
27.
It begins at the level of the iliac crest, where it is continuous with the descending colon, and ends in the sigmoid colon at the superior aperture of the lesser pelvis.
28.
The nerve emerges from the psoas major in the outer part of its upper border, and crosses in front of the quadratus lumborum to the iliac crest, running behind the kidneys.
29.
Superiorly it continues on to the back of the thorax where it attaches to the vertebral spines and the ribs, inferiorly to the posterior quarter of the outer lip of the Iliac crest.
30.
The iliac crest is a commonly used anatomical landmark for lumbar epidural injections, as this level roughly corresponds with the fourth lumbar vertebra, which is usually well below the ligamentum flavum and the epidural space.
