Pectoralis Minor - Muscle Physiology & Functional Anatomy

Pectoralis Minor Muscle

 

Anatomy

 

Origin:

  • Anterior surface of the (3rd to 5th) ribs near the costal cartilages

Insertion:

  • Medial border and superior surface of the coracoid process of the (superior anterior) scapula



Major Arteries:

  • Pectoral branch of the thoracoacromial trunk

 

Neural Innervation:

  • Medial pectoral nerve (C8, T1)

 

Trigger Points:

Trigger Points of the Pectoralis Minor

 

Physiology

 

Concentric Functions:

  • Abduction (protraction), depression & downward (during abduction) rotation of the scapula

 

Eccentric Functions:

  • Decelerates scapular retraction, shoulder extension, horizontal abduction, external rotation and
    retraction

 

Isometric Function:

  • Dynamically stabilizes the scapula during functional movements

 

Related Muscles

 

Antagonists

 

Exercises:

 

 


More Images of the Pectoralis Minor Muscle

Pectoralis Minor


More Information about the the Pectoralis Minor Muscle

The pectoralis minor muscle lies under the superficial pectoralis major muscle.

 

 

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