Rhomboid minor

Rhomboid minor is a muscle of the back / upper limb, which acts on the scapula

  • origin: nuchal ligament, spinous processes of C7 and T1 vertebrae
  • insertion: medial border of scapula at the root of the spine of scapula
  • nerve supply: dorsal scapular nerve (C4, C5)
  • arterial supply: dorsal scapular artery
  • action: adducts (retracts) and internally rotates the scapula; aids in scapular elevation

Rhomboid minor sits in parallel above the rhomboid major. It forms a narrow ribbon of muscle and arises from the the vertebral spines of C7 and T1 before inserting into the scapula on its medial border below the attachment of levator scapulae.

The rhomboids are innervated by the dorsal scapular nerve from the C5 root of the brachial plexus. This nerve passes through the middle scalene, running deep to levator scapulae which it also supplies. It innervates the rhomboids from their deep surface.

Upper limb anatomy
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Article information

rID: 39474
Section: Anatomy
Tag: refs
Synonyms or Alternate Spellings:
  • Rhomboid minor muscle

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Cases and figures

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    Figure 1: muscles that position that pectoral girdle
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