Serratus Anterior - Muscle Physiology & Functional Anatomy

Serratus Anterior Muscle





  • Fleshy slips from the outer surface of upper 8 or 9 ribs


  • Costal aspect of medial margin of the scapula

Major Arteries:

  • Upper part of lateral thoracic artery

  • Lower part of thoracodorsal artery


Neural Innervation:

  • Long thoracic nerve (from roots of brachial plexus C5, 6, 7)


Trigger Points:

Trigger Points of the Serratus AnteriorSerratus Anterior Trigger Points




Concentric Function:

  • Abduction (protraction) & upward rotation of the scapula


Eccentric Functions:

  • Decelerates dynamic scapular retraction


Isometric Function:

  • Helps stabilize the scapulo-throacic joint


Related Muscles








More Images of the Serratus Anterior Muscle

Serratus Anterior Muscle

Serratus Anterior and Deep Muscles

More Information about the Serratus Anterior Muscle

The serratus anterior muscle can be seen

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