psoas minor muscle

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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.
References in periodicals archive ?
Psoas Strength and Flexibility: Core Workouts to Increase Mobility, Reduce Injuries and End Back Pain" by certified physical therapist Pamela Ellgen is a profusely illustrated, 144 page, do-it-yourself instruction manual that includes fifty step-by-step exercises that can be done at home to increase physical mobility, reduce (and even end) back pain, and help heal injuries suffered by the psoas major and/or psoas minor muscle system.