Lateral & Medial Rotation

• Lateral (upward) rotation:

  • Glenoid fossa turns upwards (occurs passively as you flex/abduct glenohumeral joint)
  • (Accompanied by scapular elevation)

  
• Medial (downward) rotation:

  • Glenoid fossa turns downwards (occurs passively as you extend/adduct glenohumeral joint)
  • (Accompanied by scapular depression)

  
• Scapular Lateral / Medial Rotation:

  • ROM about 10 - 12 cm upward/lateral displacement of inferior angle of scapula
• Acromioclavicular medial rotation and lateral rotation are both limited by both coracoclavicular ligaments