Iliac crest
| Iliac crest | |
|---|---|
 Pelvic girdle. | |
 Overview of Ilium as largest bone of the pelvis | |
| Details | |
| Identifiers | |
| Latin | crista iliaca |
| TA98 | A02.5.01.106 |
| TA2 | 1322 |
| FMA | 16914 |
| Anatomical terms of bone | |
The crest of the ilium (or iliac crest) is the superior border of the
Structure
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.[1] Palpable in its entire length, the crest is convex superiorly but is sinuously curved, being concave inward in front, concave outward behind.[2]
It is thinner at the center than at the extremities.
Development
The iliac crest is derived from
Function
To the external lip are attached the
To the internal lip, the
- Abdominal external oblique muscle
- Abdominal internal oblique muscle
- Transversus abdominis muscle
- Quadratus lumborum muscle
- Erector spinae
- Iliocostalis pars lumborum
- Longissimus pars thoracis[3]
- Latissimus dorsi
- Tensor fasciae latae
- Iliacus muscle
- Fascia lata
- Iliac fascia
- Transverse fascia
Clinical significance
The iliac crest has a large amount of red
The top of the iliac crests also marks the level of the fourth lumbar vertebral body (L4), above or below which lumbar puncture may be performed. Furthermore, said level is often referred to as the "intercristal line".
Additional images
-
Muscles connecting the upper extremity to the vertebral column. Left iliac crest is labeled in red. -
Plan of ossification of the hip bone -
The Obliquus internus abdominis -
Muscles of the iliac and anterior femoral regions -
The relations of the kidneys from behind -
Iliac crest labeled at center right -
Iliac crest
See also
References
This article incorporates text in the public domain from page 234 of the 20th edition of Gray's Anatomy (1918)
- Bogduk, Nikolai; Endres, Stephen M. (2005). Clinical anatomy of the lumbar spine and sacrum (4th ed.). Elsevier Health Sciences. p. 106. ISBN 0-443-10119-1.
- Palastanga, Nigel; Field, Derek; Soames, Roger (2006). Anatomy and Human Movement: Structure and Function. Elsevier Health Sciences. ISBN 0-7506-8814-9.
- Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). ISBN 3-13-533305-1.
External links
- Atlas image: back_bone30 at the University of Michigan Health System - "The Back, Posterior View" (#4)
