| Bone: Anterior inferior iliac spine | |
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| The Obturator externus. (Anterior inferior iliac spine visible in upper right.) | |
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| Right hip-joint from the front. (Ant. inf. iliac spine visible at upper left.) | |
| Latin | spina iliaca anterior inferior |
| Gray's | subject #57 234 |
The anterior inferior iliac spine (AIIS) is a bony eminence on the anterior border of the hip bone, or, more precisely, the wing of the ilium (i.e. the upper lateral parts of the pelvis).
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Function and context
The upper portion of the spine gives origin to the straight head of the rectus femoris muscle, while a teardrop-shaped lower portion gives origin to the iliofemoral ligament of the hip joint and borders the rim of the acetabulum.[1]
Antero-medially and inferiorly to the AIIS is the iliopsoas groove, the passage for the iliopsoas muscle as it passes down to the lesser trochanter of the femur. A vague line, the inferior gluteal line, might run from the AIIS to the greater sciatic notch which delineates the inferior extent of the gluteus minimus origin.[1]
The AIIS is formed from a separate apophysis.[1]
Additional images
 Left hip-joint, opened by removing the floor of the acetabulum from within the pelvis. |
Notes
References
- Morris, Craig E. (2005). Low back syndromes: integrated clinical management. McGraw-Hill Professional. ISBN 0071374728. http://books.google.se/books?id=EwKCu-Fti0YC&pg=PA49.
External links
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