Anatomy
Origin:
Lateral surface of T12 and L1 and the intervening intervertebral disc.
Insertion:
Pectineal line of pelvic brim and iliopubic eminence and iliac fascia.
Key Relations:
-Found in only 60% of population.
-When present it is found lying across the surface of the psoas major muscle.
Functions
Weakly flexes the trunk.
Supply
Nerve Supply:
Anterior rami of L1.
Blood Supply:
Branches of the lumbar arteries.
Interested in taking our award-winning Pocket Anatomy app for a test drive?
