Motor supply :
All the intrinsic muscles, except the palatoglossus are supplied by the hypoglossal nerve. the palatoglossus is supplied by the cranial part of accessory nerve through the pharyngeal plexus .
Sensory supply :
Anterior 2/3rd of the tongue - lingual nerve is the nerve of general sensation and the chordatympani is the nerve of taste for the anterior two-thirds of the tongue .
Posterior 2/3rd of tongue - the glossopharyngeal nerve is the nerve for both general sensation and taste sensation for the posterior 1/3rd of the tongue .
The posterior most part of the tongue is supplied by the vagus nerve through the internal laryngeal branch .