Nerve Supply Of Tongue

Nerve Supply Of Tongue . 

  The tongue is a muscular organ situated in the floor of the mouth . It associated with the function of  Taste,  Speech, chewing, deglutition . Tongue comprises skeletal muscle which is voluntary. 

There are two types of nerve supply to the tongue. Which are as follow,

Motar Nerves : 

•  All intrensic and extrensic muscles, except palatoglossus, are supplied by the hypoglossal nerve.
• The palatoglossus is supplied by the cranial root of the accessory nerve through the pharyngeal plexus .  
• So seven out of eight muscles are supplied by Xll nerve. 
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Sensory nerve : 

•  The lingual nerve is nerve of general sensation, and chorda tympani is the nerve for the anterior 2/3 of the tongue except vallate papillae.
• The glossopharyngeal nerve is the nerve for both general sensation and taste for the posterior 1/3 of the tongue including the circumvallate papillae. 
• The posterior most of the tongue is supplied by the vagus nerve through the internal laryngal branch.  
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