Teres Minor

• Teres Minor:

  • Thin muscle situated below infraspinatus and above teres major

  
• O (origin)

  • Upper 2/3 of the lateral border of the scapula

  A) Teres Minor

  
• R (direction)

  • Upwards and laterally

  A) Teres Minor

  
• I (insertion)

  • Lowest facet on the greater tubercle via a narrow tendon which also reinforces the posterior part of the capsule

  A) Teres Minor

  
• A (actions)

  • Lateral rotation in the anatomical position
  • adducts the abducted arm

  A) Teres Minor

  
• NS (nerve supply)

  • Axillary nerve (C5, C6)

  A) Teres Minor

  
• Teres Minor - Function:

  • Resists upward displacement of the head of humerus during active contraction of deltoid

  A) Teres Minor