<prompt> All are true about iliolumbar ligament, exceptAttached to transverse process of L4Lower part attached to sacrospinous ligamentIt is attached to iliac crestSuperiorly continuous with thoracolumbar fascia  <response>: Ref. Grays anatomy. 41st edition. Page. 1090 Ilio-Lumbar Ligament:The portion of the iliolumbar ligament originating from the L-5 transverse process is made up of two bands anterior and posterior.The anterior band is broad and flat and has two different anatomic varieties. Type 1 originates from the anterior aspect of the inferolateral portion of the L-5 transverse process and fans out widely before inserting on the anterior portion of the iliac tuberosity.Type 2 originates anteriorly, laterally, and posteriorly from inferolateral aspect of the L-5 transverse process and fans out before inserting on the anterior portion of the iliac tuberosity. It is probable that the spatial disposition of the iliolumbar ligament influences its antitorsional roleOrigin: transverse process of L5insertion: deep into ventral margin of iliac crest 6-7cm from midlineThe main part of ILL originates from L5 transverse processes. insert was shield by crest dorsally,making it inaccessable to palpation. 