Psoas minor muscle
The psoas minor is a long, slender skeletal muscle which, when present, is located in front of the psoas major muscle. This muscle does not exist in about half the human population [2], or, according to some authors [3], in the 40% of the population.
Actions
The psoas minor is a weak flexor of the lumbar vertebral column.
Course
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.[4] Variations occur, however, and the insertion on the iliopubic eminence sometimes radiates into the iliopectineal arch.[1]
Additional images
Notes
- ^ a b Platzer (2004), p 234
- ^ Tank (2005), p 93
- ^ Gray (2008), p 1372
- ^ Bendavid (2001), p 58
References
- Bendavid, Robert; Abrahamson, Jack; Arregui, Maurice E. (2001). Abdominal Wall Hernias: Principle and Management. Springer. ISBN 0387950044. http://books.google.se/books?id=ai6fOllPH44C&pg=RA1-PA58.
- 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