Protraction & Retraction

• Scapular Protraction and Retraction

  • Lateral and medial movement of the shoulder blade around the chest wall

  
• Protraction:

  glenoid fossa moves more anterior (rounding shoulders)

  
• Retraction

  glenoid fossa moves more lateral (pulling shoulders back)

  
• Scapular Protraction and Retraction

  • Total range of linear translation of the scapula around the chest wall is about 15 cm

  
• Sternoclavicular retraction and protraction both limited by costoclavicular ligament and anterior/posterior sternoclavicular ligament