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Anterior inferior iliac spine

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Title: Anterior inferior iliac spine  
Author: World Heritage Encyclopedia
Language: English
Subject: Ilium (bone), Rectus femoris muscle, Iliofemoral ligament, Iliopubic eminence, Greater sciatic notch
Publisher: World Heritage Encyclopedia

Anterior inferior iliac spine

Anterior inferior iliac spine
The obturator externus muscle
(anterior inferior iliac spine visible in upper right)
Right hip-joint from the front
(anterior inferior iliac spine visible at upper left)
Latin Spina iliaca anterior inferior
Anatomical terms of bone

The anterior inferior iliac spine (abbreviated: 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).


  • Function and context 1
  • Additional images 2
  • Notes 3
  • External links 4

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


  1. ^ a b c Morris, Craig E. (2005). Low back syndromes: integrated clinical management. McGraw-Hill Professional. pp. 49–50.  

External links

  • Anatomy figure: 12:01-04 at Human Anatomy Online, SUNY Downstate Medical Center
  • Anatomy photo:17:st-0202 at the SUNY Downstate Medical Center
  • Anatomy photo:17:os-0104 at the SUNY Downstate Medical Center

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