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
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 1 Course 2 Additional images 3 Notes 4 References 5 External links

[edit] 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]

[edit] Additional images

Right hip bone. Internal surface.

Right femur. Posterior surface.

[edit] Notes

[edit] 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 As such, some of the information contained within it may be outdated.

[edit] External links

• LUC psmn
• -1254817712 at GPnotebook

v • d • e List of muscles of lower limbs (TA A04.7, GA 4.465) ILIAC Region / ILIOPSOAS psoas major/psoas minor · iliacus BUTTOCKS gluteals: (maximus, medius, minimus) · tensor fasciae latae lateral rotator group: quadratus femoris · inferior gemellus · obturator internus · superior gemellus · piriformis THIGH / compartments Anterior sartorius · quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) · articularis genu Posterior/hamstring biceps femoris · semitendinosus · semimembranosus Medial pectineus · obturator externus · gracilis · adductor (longus, brevis, magnus) Fascia Femoral sheath (Femoral canal) · Femoral ring Adductor canal · Adductor hiatus fascia lata (Iliotibial tract, Lateral intermuscular septum of thigh, Medial intermuscular septum of thigh, Fascia cribrosa/Saphenous opening) LEG/ Crus/ compartments Anterior tibialis anterior · extensor hallucis longus · extensor digitorum longus · peroneus tertius Posterior superficial · triceps surae (gastrocnemius, soleus, Achilles tendon) · plantaris deep · tarsal tunnel (flexor hallucis longus, flexor digitorum longus, tibialis posterior) · popliteus Lateral peroneus muscles (longus, brevis) Fascia Pes anserinus crural fascia (Anterior crural intermuscular septum, Posterior crural intermuscular septum, Transverse intermuscular septum) FOOT Dorsal extensor hallucis brevis · extensor digitorum brevis Plantar 1st layer (abductor hallucis, flexor digitorum brevis, abductor digiti minimi) · 2nd layer (quadratus plantae, lumbrical muscle) · 3rd layer (flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis) · 4th layer (dorsal interossei, plantar interossei) Fascia Plantar fascia retinacula (Peroneal, Inferior extensor, Superior extensor, Flexor)

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