Q-17. Taste sensation from posterior 1/3rd of tongue carried by
a) Glosso-pharyngeal
b) Lingual
c) Chorda-tympani
d) Vagus
Answer: Glosso-pharyngeal
Explanation:
Innervation of taste and sensation is different for the anterior and posterior part of the tongue because they are derived from different embryological structures.
Anterior two thirds of tongue:
Taste: chorda tympani branch of the facial nerve (CN VII)
Posterior one third of tongue:
Taste and sensation: Glosso-pharyngeal nerve (CN IX)