Anterior superior iliac spine

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Anterior superior iliac spine
Gray435.png
The obturator membrane (anterior superior iliac spine visible in upper right of illustration)
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Anterior superior iliac spine labeled second to bottom, right.
Details
Latin Spina iliaca anterior superior
Identifiers
Gray's p.234
Anatomical terms of bone

The anterior superior iliac spine (abbreviated: ASIS) is a bony projection of the iliac bone and an important landmark of surface anatomy. It refers to the anterior extremity of the iliac crest of the pelvis, which provides attachment for the inguinal ligament, and the sartorius muscle. The Tensor fasciae latae muscle attaches about 5cm away at the iliac tubercle.

The anterior superior iliac spine provides a clue in identifying some other clinical landmarks, including:

  1. McBurney's point
  2. Roser-Nélaton line
  3. True leg length (see unequal leg length)

Etymology[edit]

A – Anterior (front, like the face)
S – Superior (towards the head, opposite to feet)
IIliac (Pelvis bone)
SSpine

Additional images[edit]

See also[edit]

External links[edit]