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Medical Term:

psoas minor (muscle)


Definition: an inconstant muscle, absent in about 40%; origin, bodies of twelfth thoracic and first lumbar vertebrae and disc between them; insertion, iliopubic eminence via iliopectineal arch (iliac fascia); action, assists in flexion of lumbar spine; nerve supply, lumbar plexus.

Synonym(s): musculus psoas minorTA, smaller psoas (muscle)

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.