Outer lip of iliac crest
Labium externum cristae iliacae
- Related terms: Outer lip
Definition
The outer lip of iliac crest constitutes the lateral portion of the ventral (anterior 2/3rd) segment of the hip bone’s iliac crest. It is positioned lateral to the intermediate zone.
In general, the iliac crest of the hip bone can be anatomically divided into ventral (anterior 2/3rd) and dorsal (posterior 1/3rd) segments. The ventral segment can be further subdivided into three longitudinal regions:
An outer lip of iliac crest
An inner lip of iliac crest
An intermediate zone, which lies between the outer and inner lips.
The outer lip of iliac crest serves as the attachment site for the fascia lata along its entire length. Muscles attached to the outer lip, in an anterior to posterior direction, include the tensor fasciae latae, external oblique, and latissimus dorsi. Notably, a prominent bony projection known as the iliac tubercle extends outward from the outer lip, positioned slightly behind the anterior superior iliac spine. It serves as the point of origin for the iliotibial tract.
References
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Text written by Muhammad A. Javaid, MD, PhD © 2023 IMAIOS.
Standring, S. and Gray, H. (2016). ‘Chapter 80: Pelvic girdle, gluteal region and thigh’ in Gray’s anatomy The anatomical Basis of Clinical Practice. (41st ed.) New York: Elsevier, pp. 1341-1343.
