Definition

Noun: - The glossopharyngeal nerve: The ninth cranial nerve (CN IX). It is a mixed nerve, meaning it contains both sensory and motor fibers. Its primary functions are to provide sensory information from the pharynx (throat), the back of the tongue (including taste for the posterior one-third), and the carotid body and sinus. It also provides motor control to the stylopharyngeus muscle (which helps elevate the pharynx and larynx during swallowing and speaking) and carries parasympathetic fibers to the parotid gland to stimulate saliva production.

Usage Examples

• Noun:
  • Damage to the nervus glossopharyngeus can result in loss of the gag reflex.
  • The nervus glossopharyngeus transmits taste sensations from the posterior part of the tongue.
  • During the neurological exam, the doctor tested the function of the glossopharyngeal nerve.

Advanced Usage

• Clinical Context: Often discussed in medical fields like neurology, otolaryngology, and anatomy. It is frequently examined by touching the back of a patient's throat to elicit the gag reflex.
  • Glossopharyngeal neuralgia is a condition characterized by severe pain in the areas innervated by the nervus glossopharyngeus.

Variants and Related Words

• Glossopharyngeal nerve: The common English term, synonymous with .
• Cranial Nerve IX (CN IX): Its numerical designation within the set of twelve cranial nerves.
• Stylopharyngeus muscle: The primary muscle it motorically innervates.
• Otic ganglion: The parasympathetic ganglion where its fibers synapse.

Synonyms

• Glossopharyngeal nerve (primary synonym)
• Ninth cranial nerve
• CN IX

Related Phrases and Terms

• Glossopharyngeal neuralgia: A disorder involving severe, episodic pain along the path of this nerve.
• Gag reflex: A protective reflex mediated in part by the sensory input of this nerve.
• Carotid sinus reflex: A baroreceptor reflex involving sensory fibers from the carotid sinus carried by this nerve.

Noun

1. sensory nerve to the pharynx and back of the tongue; motor fibers innervate muscles that elevate the pharynx and larynx; includes parasympathetic fibers to the otic ganglion