Psoas minor muscle
| Psoas minor muscle | |
|---|---|
 Muscles of the iliac and anterior femoral regions. (Psoas minor visible near top right.) | |
| Details | |
| Origin | Lateral surface bodies of T12 and L1 vertebrae and intervening intervertebral disc |
| Insertion | Pectineal line and iliopubic eminence |
| Nerve | Anterior ramus of nerve L1 |
| Actions | Weak trunk flexor |
| Antagonist | Gluteus maximus |
| Identifiers | |
| Latin | Musculus psoas minor |
| MeSH | A02.633.567.825 |
| Dorlands /Elsevier | m_22/12550283 |
| TA | A04.7.02.005 |
| FMA | 22350 |
The psoas minor is a long, slender skeletal muscle which, when present, is located anterior to the psoas major muscle.[1][2]
Structure
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]
Function
The psoas minor is a weak flexor of the lumbar vertebral column.
Additional images
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Right hip bone. Internal surface.
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Right femur. Posterior surface.
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Psoas minor muscle
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Psoas minor muscle
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Psoas minor muscle
Notes
References
- 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.). 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
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Wikimedia Commons has media related to Psoas minor muscles. |
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