Trapezius

• Trapezius:

  • Large, flat triangular sheet of muscle and most superficial of the back muscles
  • Three parts: Upper, middle and lower

  A) Trapezius

  
• Common 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) Trapezius

  
• middle and lower traps both insert somewhere to do with the spine of scapula (middle traps also insert into the acromion process)