Write short essay on the nerve supply of the tongue

Introduction: the tongue is the organ of taste located in
the floor of the oral cavity. It is a very mobile and muscular organ made of
skeletal muscle and covered with mucous membrane.

Nerve supply: all the muscles both intrinsic and extrinsic
are supplied by the hypoglossal nerve except the palatoglossus which is
supplied by the pharyngeal plexus.

Sensory innervation: the anterior two-thirds of the tongue
are supplied by the lingual branch of the trigeminal nerve.

The posterior one-third is supplied by the glossopharyngeal
nerve.

Special sensory supply to the anterior two-thirds of the
tongue is by the chorda tympani, branch of the fascial nerve.