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Trapezius

1. Trapezius


Origin

Medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of vertebrae C7-T12

Insertion

Lateral third of the clavicle, medial side of the acromion and the upper crest of the spine of scapula

Action

  • Scapula elevation (upper fibres)
  • Scapula depression (lower fibres)
  • Scapula retraction (middle fibres)
  • Lateral rotation of scapula (upper and lower fibres)
 




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