Psoas minor muscle

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Psoas minor muscle
Muscles of the iliac and anterior femoral regions. (Psoas minor visible near top right.)
Latin m. psoas minor
Gray's subject #127 467
Origin: Side of T12+L1 and IV Disc between
Insertion: Pectineal line and iliopectineal eminence
Nerve: L1
Action: Weak trunk flexor
Antagonist: Gluteus maximus
MeSH Psoas+Muscles
Dorlands/Elsevier m_22/12550283

The psoas minor is a long, slender muscle that is placed (when present) in front of the psoas major muscle. It is absent in 40% of individuals.[1]

It arises from the sides of the bodies of the twelfth thoracic and first lumbar vertebrae and from the intervertebral discs separating them. It ends in a long flat tendon which is inserted into the pectineal line and iliopectineal eminence, and, by its lateral border, into the iliac fascia.


  1. Patrick W., Tank (2005). Grant's Dissector (13th ed. ed.). Hagerstwon, MD: Lippincott Williams & Wilkins. p. 93. ISBN 0-7817-5484-4.

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External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

cs:Malý bedrovec de:Musculus psoas minor it:Piccolo psoas