Ala of sacrum
Ala ossis sacri
- Latin synonym: Ala ossis sacralis
- Synonym: Wing of sacrum
- Related terms: Ala; Wing of sacrum
Definition
The alae of sacrum are the paired upper part of the lateral parts of sacrum, lateral to the first sacral vertebra.
Each ala of sacrum is a large triangular surface, which supports the Psoas major and the lumbosacral trunk, and in the articulated pelvis is continuous with the iliac fossa. It is slightly concave from side to side, convex from before backward, and gives attachment to a few of the fibers of the Iliacus.
References
![Ala of sacrum - Radiography spine - Lumbar vertebrae [LI-LV] - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/rachis-radios/images/v1/337bf9f232cfda5f93aa1055a9f082ba76f6be33cd7782b5e747018ef9aaa2b4?ar=640:670&auto=format,compress&bg=000000&fit=crop&p64=NzIsMzEx&t=QWxhIG9mIHNhY3J1bQ&tx=72&ty=311&w=200&wk=1&s=2a93cf7cbfeb9c85ef2604488a84dada "Ala of sacrum - Radiography spine - Lumbar vertebrae [LI-LV] - e-Anatomy")
