| Psoas minor muscle | |
|---|---|
 |
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| 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 |
| Artery | |
| Nerve | Lumbar plexus[1] |
| Actions | Weak trunk flexor |
| Antagonist | Gluteus maximus |
| MeSH | Psoas+Muscles |
The psoas minor is a long, slender skeletal muscle that, when present, is placed in front of the psoas major muscle. It is absent in 40% of individuals.[2]
Contents |
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 reaches the inguinal ligament.[3] Variations occur, however, and the insertion on the iliopubic eminence sometimes radiates into the iliopectineal arch.[1]
Additional images
 Right hip bone. Internal surface. |
 Right femur. Posterior surface. |
Notes
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.
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 As such, some of the information contained herein may be outdated.
External links
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