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Serratus anterior

Contents

Anatomy

Serratus anterior - anterior view
Serratus anterior - lateral view
Serratus anterior - posterolateral view
Serratus anterior - anteromedial view

Position

  • Deep

Origin

  • Anterolateral part of 1.-9. rib

Insertion

  • Anterior part of medial aspect of Scapula

Main function

  • Scapula
    • Protraction
    • Upward rotation
    • Lateral rotation of inferior part

Secondary function

  • Scapula
    • Elevation
    • Depression

Nerve innervation

  • Segmental
    • C5-C7
  • Peripheral
    • Nervus thoracis longus

Arterial supply

  • Dorsal scapular artery

Referred pain pattern

Serratus anterior - pain pattern anterior view
Serratus anterior - pain pattern inferior view
Serratus anterior - pain pattern posterior view

Muscle Type

  • Phasic
    • Weakens when overactivated

Symptoms

  • Shortness of breath, dyspnea
  • Winging of Scapula
  • Limited expansion of rib cage during inhalation
  • Restricted adduction of Scapula
 

Muscle attachment zones

Videos

Short version

Detailed version

Myofascial lines

Spiral line