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Psoas minor muscle

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Title: Psoas minor muscle  
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Subject: Iliopsoas, Pelvis, Psoas, Hip flexors, Accessory soleus muscle
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Psoas minor muscle

Psoas minor muscle
Muscles of the iliac and anterior femoral regions. (Psoas minor visible near top right.)
Details
Latin Musculus psoas minor
Origin Lateral surface bodies of T12 and L1 vertebrae and intervening intervertebral disc
Insertion Pectineal line and iliopubic eminence
Anterior ramus of nerve L1
Actions Weak trunk flexor
Antagonist Gluteus maximus
Identifiers
MeSH A02.633.567.825
Dorlands
/Elsevier
m_22/12550283
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]

Contents

  • Structure 1
  • Function 2
  • Additional images 3
  • Notes 4
  • References 5
  • External links 6

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

Notes

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

References

  • (ISBN for the Americas 1-58890-159-9.)

External links

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