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Serratus Anterior

Serratus Anterior


Origin :

  • Outer surfaces and superior borders of ribs 1-8 (or 9)
  • and the fascia covering the first intercostal space.

Insertion :

  • Medial border of the scapula on its costal (deep) surface.

Innervation :

  • Long thoracic nerve (from ventral rami C5-C7)

Arterial Supply :

  • Lateral thoracic artery

Depth :

  • Superficial


Action :

  • Draws the scapula forward.
  • The inferior fibers rotate the scapula superiorly.
Target Muscles Target Muscles