GROSS ANATOMY
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Facial; sweet/salty
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Facial; sour/bitter
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Glossopharyngeal; sweet/salty
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Glossopharyngeal; sour/bitter
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Detailed explanation-1: -Taste to the anterior two-thirds of the tongue is achieved through innervation from the chorda tympani nerve, a branch of the facial nerve (CN VII).
Detailed explanation-2: -The glossopharyngeal (IX) is the most important nerve for the sense of taste.
Detailed explanation-3: -CN VII, or the facial nerve, is responsible for taste in the anterior two-thirds of the tongue. CN IX (glossopharyngeal) and CN X (vagus) are responsible for taste in the posterior one-third of the tongue and into the pharynx.
Detailed explanation-4: -The facial nerve (CN VII) innervates the anterior two thirds of the tongue, the glossopharyngeal nerve (CN IX) innervates the posterior one third of the tongue, and the vagal nerve (CN X) carries taste information from the back part of the mouth, including the upper third of the esophagus.