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Trapezius − Upper Fibers
- Elevates, retracts and rotates scapula; Upper (superior) fibers elevate scapula;
- Medial third of superior nuchal line; external occipital protruberance, nuchal ligament and spinous processes of C7 − T12 vertebrae.
- Lateral third of clavicle, acromion and spine of scapula.
- Spinal root of accessory nerve (CN XI) (motor) and cervical nerves (C3 and C4) (pain and proprioception).
Arterial Supply :
- Transverse certical artery.
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