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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