Middle Trapezius

• O (origin)

  • Extensive medial attachment from the base of the medial 1/3 of the superior nuchal line and the occipital bone
  • Ligamentum nuchae
  • Spinous processes of C7 to T12 and the intervening supraspinous ligament

  A) Middle Trapezius

  
• R (direction)

  • Almost horizontally

  A) Middle Trapezius

  
• I (insertions)

  • Medial border of the acromion and the upper border of the crest of the scapula spine

  A) Middle Trapezius

  
• A (actions)

  • Retraction of scapula

  A) Middle Trapezius

  
• NS (nerve supply)

  • Motor: Spinal part of cranial nerve 11 (‘Accessory’ nerve)
  • Sensory: Ventral rami C3, C4

  A) Middle Trapezius