rotator cuff (intrinsic shoulder muscles)

• Rotator cuff muscles include..

  -supraspinatus

  -infraspinatus

  -teres minor

  -subscapularis
• Supraspinatus origin

  supraspinous fossa
• supraspinatus insertion

  greater tubercle of humerus
• supraspinatus action

  abduct humerus
• supraspinatus innervation

  suprascapular nerve
• infraspinatus origin

  infraspinous fossa
• infraspinatus insertion

  greater tubercle
• infraspinatus action

  laterally rotate humerus
• infraspinatus innervation

  suprascapular nerve
• Teres minor origin

  lateral border of scapula
• teres minor insertion

  greater tubercle
• teres minor action

  laterally rotate and adduct humerus
• teres minor innevation

  axillary nerve
• subscapularis origin

  subscapular fossa
• subscapularis insertion

  lesser tubercle
• subscapularis action

  medially rotate humerus
• subscapularis innervation

  upper and lower subscapular nerve