Anterior inferior iliac spine

The anterior inferior iliac spine (ASIS) is bony prominence on the anterior border of the ilium forming the superior border of the acetabulum.

Attachments include Iliacus, origin of rectus femoris, and also the the proximal ileofemoral ligament (Y-ligament or ligament of Bigelow). 

It is a useful anatomical landmark: needle puncture of hip joint may be approached 5 cm below the ASIS and aiming superomedially. 

Related pathology

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Article information

rID: 53514
Section: Anatomy
Tag: pelvis
Synonyms or Alternate Spellings:

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