Behind the iliac fossa is a rough surface divided into two portions an anterior and a posterior. The posterior portion known as the iliac tuberosity is elevated and rough for the attachment of the posterior sacroiliac ligaments and for the origins of the Sacrospinalis and Multifidus.
This page contains content from the copyrighted Wikipedia article "Iliac tuberosity"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.