Learn Trapezius Muscles by StudyGallery.com

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Origin - C7 - T12 vertebrae

Inserts - Lateral third of clavicle, acromion, and spine of scapula

Action - Elevates, retracts and rotates scapula; superior fibers elevate, middle fibers retract, and inferior fibers depress scapula; superior and inferior fibers act together in superior rotation of scapula