Den tolfte hjärnnerven (nervus hypoglossus) utgår från hypoglossuskärnan i den förlängda märgen och leder nervimpulser till tungans alla muskler utom palatoglossus, som försörjs av vagusnerven (den 10:e hjärnnerven). Nerven leder även proprioceptiva signaler från tungans muskler.
The 12th cranial nerve. The hypoglossal nerve originates in the hypoglossal nucleus of the medulla and supplies motor innervation to all of the muscles of the tongue except the palatoglossus (which is supplied by the vagus). This nerve also contains proprioceptive afferents from the tongue muscles.
Nervus hypoglossus
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