Serratus Anterior

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Other Names

  • Serratus Magnus
  • Boxer's Muscle

Heads

  • Digitations
    1. Superior
    2. Inferior (Longer)

Movement

Scapula

Attachments

Origin

  • Ribs (Surface) [1, 2]
    • Upper 8 or 9

Insertion

  • Scapula (Medial) [1, 2]
    • Medial Border
      • Anterior Surface

Related Muscles

 Serratus AnteriorSerratus Anterior with scapula pulled away to see superior fibers

Serratus Anterior cross section view

Comments

The serratus anterior holds scapula against thoracic wall. A winged scapula condition indicates weakness of serratus anterior.

They also help stabilize scapula during shoulder internal and external rotation when shoulder is 90° abduction (Ekstom RA, et al. 2003; Myers JB, et al. 2005)

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