Which large muscle runs along the side of the neck and upper back?

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Multiple Choice

Which large muscle runs along the side of the neck and upper back?

Explanation:
The large muscle that runs along the side of the neck and upper back is the trapezius. This broad muscle starts high on the skull and neck, sweeps down the upper back, and attaches to the clavicle, acromion, and spine of the scapula. Its upper fibers run along the side of the neck, giving that region its shape, while the middle and lower fibers cover the upper back. The trapezius can elevate the scapula (as in a shrug), retract and rotate the scapula, and assist with neck extension. The other options are bones (ulna, tibia, vertebra) and do not describe a muscle.

The large muscle that runs along the side of the neck and upper back is the trapezius. This broad muscle starts high on the skull and neck, sweeps down the upper back, and attaches to the clavicle, acromion, and spine of the scapula. Its upper fibers run along the side of the neck, giving that region its shape, while the middle and lower fibers cover the upper back. The trapezius can elevate the scapula (as in a shrug), retract and rotate the scapula, and assist with neck extension. The other options are bones (ulna, tibia, vertebra) and do not describe a muscle.

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