Hypoglossal Nerve

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Related to Hypoglossal Nerve: glossopharyngeal nerve

hypoglossal nerve

[¦hī·pə¦gläs·əl ′nərv]
The twelfth cranial nerve; a paired motor nerve in tetrapod vertebrates innervating tongue muscles; corresponds to the hypobranchial nerve in fishes.

Hypoglossal Nerve


the 12th pair of cranial nerves. The hypoglossal nerve originates from the nerve cells that form its motor nucleus, which are located in the brain stem at the medulla oblongata. The appendages of the nerve cells unite in ten to 15 rootlets between the pyramid and the olive. Upon merging in a common trunk, they depart from the skull through the hypoglossal canal into the occipital bone. After leaving the skull, the hypoglossal nerve forms an arch and, at the anterior end of the hyoglossal muscle, branches into terminal branches, which innervate the musculature of the tongue. When a disorder of hypoglossal nerve exists, the corresponding half of the tongue becomes paralyzed, and the tongue muscles atrophy.

References in periodicals archive ?
1 Cases of isolated hypoglossal nerve palsy without any accompanying neurological symptoms are very rare, and are classified as idiopathic if a clear cause is not found.
Treating obstructive sleep apnea with hypoglossal nerve stimulation.
Unilateral hypoglossal nerve palsy due to neurovascular conflict in a child.
Treatment, which delivered unilateral stimulation of the hypoglossal nerve, "synchronous with ventilation, resulted in significant and clinically meaningful reductions in the severity of sleep apnea and self-reported sleepiness and improvement in quality of life measures at 1 year" (N.
hypoglossal nerve (XII n) recordings were obtained by suctioning the nerve with a suction electrode and amplified with a differential amplifier.
The pacemaker-like device monitors breathing patterns and is activated during sleep to stimulate the hypoglossal nerve, which controls muscles in the upper airway.
Histopathologic lesions in brain of zebu with spongiform encephalopathy and cow with bovine spongiform encephalopathy, Switzerland, 2004 * Site Cow Zebu Brainstem Dorsal motor nucleus of vagus nerve (+) (++) Nucleus of spinal tract of trigeminal (++) (+++) nerve Nucleus of hypoglossal nerve (+) (++) Reticular formation (++) (++) Nucleus of solitary tract (++) (+++) Vestibular nuclei (++) (+) to (++) Olivary nuclei (++) (++) Cerebellar cortex (-) (+) Midbrain (substantia grisea centralis) (+) to (++) (++) to (+++) Thalamus (++) (++) to (+++) Hippocampus n.
However, invasive procedures of the neck carry the risk of pneumothorax, hematoma formation, vagus or hypoglossal nerve damage, and wound infection.
Growth of the hypoglossal canals in the human lineage may have accompanied a thickening of the hypoglossal nerve to coordinate tongue movements needed for speaking, Kay's group theorized.
It is important to note that nerve injury after CEA may be temporary and most often involves the 11th cranial nerve, the hypoglossal nerve.
Though there are several new neurostimulation devices competing in the market for treating OSA, we selected ImThera's aura6000 because of its ability to deliver targeted hypoglossal nerve stimulation to achieve optimal muscle stimulation.