Psoas Minor

Tuesday, October 11, 2011

The psoas minor is a long and slender muscle which arises from the last dorsal and first lumbar vertebrae, inserting into the brim of the pelvis. It is one two psoas muscles, the other being the psoas major. From the points of origin, the psoas minor travels down onto the medial border of the psoas major before inserting to the innominate line and the iliopectineal eminence of the pelvic brim. The psoas minor is innervated by the lumbar plexus and is supplied by a branch of the ileolumbar artery.