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Anterior superior iliac spine

Recommended video: Bony pelvis [27:56]
Overview of the bony pelvis.

The anterior superior iliac spine (ASIS) is a prominent and palpable bony projection of the ilium. It is the most anterior part of the ilium and also marks the anterior aspect of the iliac crest, which spans from the ASIS to the posterior superior iliac spine

The ASIS serves as an attachment point for the sartorius and tensor fasciae latae muscles, as well as the lateral end of the inguinal ligament. As it is easily palpable,  it clinically serves as an important bony landmark for localizing the inguinal ligament, common femoral artery and base of the vermiform appendix. It is also used as the proximal landmark for measuring true lower limb length. 

Terminology English: Anterior superior iliac spine
Latin: Spina iliaca anterior superior
Definition Prominent bony prominence of the ilium
Attachments Sartorius, tensor fasciae latae, lateral end of inguinal ligament

Learn more about the bony landmarks of the hip bone with this study unit:

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