TRAPEZIUS
| ORIGIN Medial third superior nuchal line, ligament nuchae, spinous processes and supraspinous ligaments to T12 |
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| INSERTION Upper fibers to lateral third of posterior border of clavicle; lower to medial acromion and superior lip of spine of scapula to deltoid tubercle |
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| ACTION laterally rotates, elevates and retracts scapula. If scapula is fixed, extends and laterally flexes neck |
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| NERVE Spinal accessory nerve (C1-5)(spinal nerves C3 and C4 for proprioception) |