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Anterior inferior iliac spine
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The anterior inferior iliac spine (AIIS) is a rough bony projection on anterior border of the ilium of the hip, inferior to the anterior superior iliac spine and immediately above the acetabulum.
The AIIS is divided into an upper part to which the straight head of the rectus femoris attaches and a lower part which serves as an attachment point for the proximal end of the iliofemoral ligament.
Avulsions of the rectus femoris from the AIIS can occur with significant mechanical stress, particularly in sports involving kicking.
| Terminology |
English: Anterior inferior iliac spine Latin: Spina iliaca anterior inferior |
| Definition | Rough bony projection on anterior border of the ilium |
| Attachments | Straight head of rectus femoris and proximal end of iliofemoral ligament |
Learn more about the bony landmarks of the hip bone with this study unit (and article):
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