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The posterior superior iliac spine (PSIS) is a bony projection of the ilium, located at the posterior end of the iliac crest, which spans between it and the anterior superior iliac spine (ASIS).
The posterior superior spine is the terminus of the iliac crest on the rear-facing side of the ilium. The posterior inferior spine is below the posterior superior spine, and at the end of a larger, roughened region called the auricular surface.
The iliac crest is the most prominent part of the ilium, the largest of the three bones that make up the bony pelvis or hip bone. Pain can occur due to wear, tear, and trauma. Exercises,...
Posterior Superior Iliac Spine (PSIS): This spine is located at the posterior end of the iliac crest and is laterally related to the iliac tuberosity and sacropelvic surface. It is commonly represented by a dimple above the medial gluteal region.
The posterior superior iliac spine serves for the attachment of the oblique portion of the posterior sacroiliac ligaments and the multifidus. See also. Dimples of Venus. References. This article incorporates text in the public domain from page 234 of the 20th edition of Gray's Anatomy (1918) External links.
The posterior superior iliac spine (PSIS) is located at the posterior end of the iliac crest. This spine cannot be palpated but is commonly represented by a dimple at the medial gluteal region . The PSIS is laterally related to the iliac tuberosity and sacropelvic surface.
posterior-inferior iliac spine (PIIS) Imaging. Plain radiographs. standard set of AP pelvis, inlet/outlet, and judet views. helpful for evaluating the iliac wing in addition to pelvic stability and possible acetabular involvement. CT scan. carefully assess CT scan for signs of bowel entrapment.
The superior margin of the wing is thickened, forming the iliac crest. It extends from the anterior superior iliac spine (ASIS) to the posterior superior iliac spine (PSIS). On the posterior aspect of the ilium there is an indentation known as the greater sciatic notch.
The posterior border of the ilium begins at the posterior superior iliac spine and extends to the posterior border of the ischium. This border contains the posterior inferior iliac spine and contributes to the superior part of the greater sciatic notch .
The posterior superior spine: the terminus of the iliac crest on the rear-facing side of the ilium. The posterior inferior spine: below the posterior superior spine, and at the end of a larger, roughened region called the auricular surface. The iliac fossa is a shallow depression on the internal surface of the upper part of the bone.