Ilium bone
A bone of the innominate and pelvis
The ilium is one of the 3 bones that make up the innominate union, which forms a part of the pelvis3.
Osteologic features
External surface
- Gluteal lines
- Posterior gluteal lines
- Anterior gluteal lines
- Inferior gluteal lines
- Anterior-superior iliac spine (ASIS)
- Anterior-inferior iliac spine (AIIS)
- Iliac crest
- Posterior-superior iliac spine (PSIS)
- Posterior-inferior iliac spine (PIIS)
- Greater sciatic notch
- Greater sciatic foramen
- Sacrotuberous ligament
- Sacrospinous ligament
Internal surface
- Iliac fossa
- Auricular surface
- Iliac tuberosity
Gluteal lines
Posterior gluteal lines
One of the osteologic features on the external surface of the ilium3
Anterior gluteal lines
One of the osteologic features on the external surface of the ilium3
Inferior gluteal lines
One of the osteologic features on the external surface of the ilium3
Anterior-superior iliac spine (ASIS)
One of the osteologic features on the external surface of the ilium3
Anterior-inferior iliac spine (AIIS)
One of the osteologic features on the external surface of the ilium3
Iliac crest
One of the osteologic features on the external surface of the ilium3
Posterior-superior iliac spine (PSIS)
One of the osteologic features on the external surface of the ilium3
Posterior-inferior iliac spine (PIIS)
One of the osteologic features on the external surface of the ilium3
Greater sciatic notch
One of the osteologic features on the external surface of the ilium3
Greater sciatic foramen
One of the osteologic features on the external surface of the ilium3
Sacrotuberous ligament
One of the osteologic features on the external surface of the ilium3
Sacrospinous ligament
One of the osteologic features on the external surface of the ilium3
Iliac fossa
One of the osteologic features on the internal surface of the ilium3. The iliac fossa is the origin of the iliacus muscle3.
| Iliac fossa origins | ||||
|---|---|---|---|---|
| Muscle | Origin | Insertion | Innervation | Action |
| Iliacus |
|
|
[L2](/The Archive/Anatomy/Skeletal Muscles/Lower limb muscles/Iliopsoas muscles/iliacus_muscle.qmd#nerve) - [L3](/The Archive/Anatomy/Skeletal Muscles/Lower limb muscles/Iliopsoas muscles/iliacus_muscle.qmd#nerve) [@gilroyAtlasAnatomy2020] |
Hip
L/S (BIL contraction)
L/S (UNIL contraction on fixed femur)
|
Auricular surface
One of the osteologic features on the internal surface of the ilium3. The auricular surface articules with the sacrum to form the sacroiliac joint3.
Iliac tuberosity
One of the osteologic features on the internal surface of the ilium3. The iliac tuberosity is posterior to the auricular surface and is an attachment point of sacroiliac ligaments3.