Trapezius muscle

Origin of Trapezius

Medial third of superior nuchal line; external occipital protruberance, nuchal ligament, and spinous processes of C7 - T12 vertebrae.

Insertion of Trapezius

Lateral third of clavicle, acromion, and spine of scapula.

Muscle Action/Function of Trapezius

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.

Arterial (Blood) Supply of Trapezius

Transverse certical artery.
trapezius muscle, anatomy, muscle picture

Trapezius Video

Trapezius Muscle

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