Levator Scapulae Anatomy

Levator Scapulae Muscle

Origin: Posterior tubercles of the transverse processes of C1 to C4
Insertion: Superior part of the medial border of the scapula
Actions: Elevation of the scapula
Innervation: Anterior primary rami of C3 and C4 and the dorsal scapular nerve (C5)
Blood Supply: Dorsal scapular artery

Primary Actions of the Levator Scapulae

1. Elevation of the scapula

Agonists:

  • Trapezius (upper part)

  Antagonists:

  • Trapezius (lower part)
  • Serratus anterior (lower part)
  • Pectoralis minor

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Secondary Actions of the Levator Scapulae

1. Downward rotation of the scapula
Agonists:

  • Serratus anterior (upper part)
  • Rhomboid major
  • Rhomboid minor
  • Pectoralis minor

Antagonists:

  • Trapezius
  • Serratus anterior (lower part)