Editing Tongue (section)

====Nerve supply====
Innervation of the tongue consists of motor fibers, [[special visceral afferent|special sensory]] fibers for taste, and [[general visceral afferent|general sensory]] fibers for sensation.<ref name=GRAYS2005 />
* Motor supply for all intrinsic and extrinsic muscles of the tongue is supplied by [[efferent nerve fiber|efferent motor nerve fibers]] from the [[hypoglossal nerve]] (CN XII), with the exception of the [[palatoglossus]], which is innervated by the [[vagus nerve]] (CN X).<ref name=GRAYS2005 />

Innervation of taste and sensation is different for the anterior and posterior part of the tongue because they are derived from different embryological structures ([[pharyngeal arch]] 1 and pharyngeal arches 3 and 4, respectively).<ref>{{Cite book | edition = Sixth | publisher = LWW | isbn = 978-1451190380 | last = Dudek | first = Dr Ronald W. | title = Board Review Series: Embryology | date = 2014}}</ref>
* Anterior two-thirds of tongue (anterior to the [[Lingual papilla#Circumvallate papillae|vallate papillae]]):
** Taste: chorda tympani branch of the [[facial nerve]] (CN VII) via [[special visceral afferent]] fibers
** Sensation: lingual branch of the mandibular (V3) division of the [[trigeminal nerve]] (CN V) via [[general visceral afferent]] fibers
* Posterior one third of tongue:
** Taste and sensation: [[glossopharyngeal nerve]] (CN IX) via a mixture of special and general visceral afferent fibers
* Base of tongue
** Taste and sensation: internal branch of the [[superior laryngeal nerve]] (itself a branch of the [[vagus nerve]], CN X)