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Full Text. The hyoid bone is a horseshoe shaped bone found in the neck. Located anteriorly between the mandible and the thyroid cartilage, the hyoid bone protects the esophagus and also facilitates the wide range of muscle activity required for speaking and swallowing. It is visible upon extension of the neck.
The sternohyoid muscle's main function is the depression of the hyoid bone. The hyoid bone is located below the mandible, or lower jaw, and is a U shaped bone that is partially responsible for tongue movement and the action of swallowing. The sternohyoid is one of a pair of muscles responsible for this action.