Lateral aspect of vertebral body of 12th thoracic and 1st lumbar vertebrae 
Pectineal line of pubis 
Small branch from the initial part of the lumbar ventral ramus(L1) 
Lumbar arteries, lumbar branch of the iliolumbar artery. 
Assists with flexion of the lumbar vertebral column
Recent Related Research (from Pubmed)
- Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/.