psoas minor muscle

(redirected from smaller psoas muscle)

pso·as mi·nor mus·cle

(sō'as mī'nŏr mŭs'ĕl)
An inconstant muscle, absent in about 40%; origin, bodies of twelfth thoracic and first lumbar vertebrae and disc between them; insertion, iliopubic eminence through iliopectineal arch (iliac fascia); action, assists in flexion of lumbar spine; nerve supply, lumbar plexus.
Synonym(s): musculus psoas minor, smaller psoas muscle.