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Hypoglossal nerve stimulators, also known as hypoglossal nerve stimulation (HNS) devices, are medical devices used to treat obstructive sleep apnea (OSA) in patients who have not adequately responded to or are unable to tolerate other treatments such as continuous positive airway pressure (CPAP) therapy or surgery. The hypoglossal nerve is a cranial nerve (cranial nerve XII) responsible for controlling the movement of the tongue during speech and swallowing.
