Psoas minor muscle

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Psoas minor muscle
Musculus psoas minor.png
Muscles of the iliac and anterior femoral regions. (Psoas minor visible near top right.)
Latin Musculus psoas minor
Lateral surface bodies of T12 and L1 vertebrae and intervening intervertebral disc
Pectineal line and iliopubic eminence
Anterior ramus of nerve L1
Actions Weak trunk flexor
Gluteus maximus
Gray's p.467
MeSH A02.633.567.825
TA A04.7.02.005
FMA 22350
Anatomical terms of muscle

The psoas minor is a long, slender skeletal muscle which, when present, is located anterior to the psoas major muscle.[1][2]


Psoas minor originates from the vertical fascicles inserted on the last thoracic and first lumbar vertebrae. From there, it passes down onto the medial border of the psoas major, and is inserted to the innominate line and the iliopectineal eminence. Additionally, it attaches to and stretches the deep surface of the iliac fascia and, occasionally, its lowermost fibers reach the inguinal ligament.[3] Variations occur, however, and the insertion on the iliopubic eminence sometimes radiates into the iliopectineal arch.[4]


The psoas minor is a weak flexor of the lumbar vertebral column.

Additional images[edit]


  1. ^ Tank (2005), p 93
  2. ^ Gray (2008), p 1372
  3. ^ Bendavid (2001), p 58
  4. ^ Platzer (2004), p 234


  • Bendavid, Robert; Abrahamson, Jack; Arregui, Maurice E. (2001). Abdominal Wall Hernias: Principle and Management. Springer. ISBN 0-387-95004-4. 
  • Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol 1: Locomotor system (5th ed.). Thieme. ISBN 3-13-533305-1.  (ISBN for the Americas 1-58890-159-9.)
  • Tank, Patrick W. (2005). Grant's Dissector (13th ed. ed.). Hagerstown, MD: Lippincott Williams & Wilkins. ISBN 0-7817-5484-4. 
  • Gray, Henry; Standring, Susan (2008). Gray's Anatomy - The Anatomical Basis of Clinical Practice (40th ed.). Churchill Livingstone - Elsevier. ISBN 978-0-443-06684-9. 

External links[edit]