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| | Neck Herniated Disk |
 | | The clavicle or collar-bone forms the lower limit of the neck, and laterally the outward slope of the neck to theshoulder is caused by the trapezius muscle. |
 | | Disk came into the English language in the mid-17th century, and was modelled on words such as whisk ; disc arose some time later, and was based on the original Latin root discus. |
 | | In the 19th century, disc became the conventional spelling for audio recordings made on a flat plate, such as the gramophone record ; this usage gave rise to the modern term disc jockey. |
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