How do you find ASIS and PSIS?
ASIS: known as the “hip bones.” These are the bones that stick out in the front of our pelvis and where we often rest our hands. PSIS: Look for the “dimples” or indentations in the lower back and then push deep into that area to palpate the PSISs.
What does the posterior end of iliac crest form?
The latissimus dorsi muscle forms one of its many origins along the posterior edge of the iliac crest, while the posterior superior spine gives rise to the gluteus maximus muscle of the buttock.
What are the 3 surfaces of the ilium?
It has four borders – superior, anterior, posterior and medial borders; and three surfaces – gluteal, iliac fossa and sacropelvic.
Where is the posterior iliac crest located?
The iliac crest stretches posteriorly from the anterior superior iliac spine (ASIS) to the posterior superior iliac spine (PSIS). Behind the ASIS, it divides into an outer and inner lip separated by the intermediate zone. The outer lip bulges laterally into the iliac tubercle.
Where do you palpate iliac crest?
You can find the iliac crests by placing the sides of your forefinger/hand in the fleshy part of the waist at the level of the umbilicus, move inferiorly and the first hard lumps you feel on each side are the iliac crests. This level corresponds to around L3-L4 lumbar vertebrae.
What muscles attach to the PSIS?
As the most posterior projection of the iliac crest, it serves for the attachment of the long posterior sacroiliac ligament, which blends with the sacrotuberous ligament, as well as the multifidus and gluteus maximus muscles. Figure 1 depicts the muscular and ligamentous attachments to the PSIS. Figure 1.
What is the most posterior marking on the ilium?
Posterior gluteal line (Linea glutea poste-rior) is a short, ridge on the external surface of the ilium.
What is the auricular surface of ilium?
The auricular surface of the ilium articulates with the sacrum to form the sacroiliac joint. The medial surface of the upper ilium forms the iliac fossa, with the arcuate line marking the inferior limit of this area. The posterior margin of the ilium has the large greater sciatic notch.
Where does the iliac crest originate?