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Glossopharyngeal N.
Stack #3637
| Branch | Enters | Course |
|---|---|---|
| Glossopharyngeal Nerve | Jugular foramen | innervates stylopharyngeus muscle and then enters oropharynx to innervate pharyngeal mucosa. continues to post. 1/3 of tongue |
| Tympanic Nerve | branches from glossopharyngeal | enters middle ear cavity and forms tympanic plexus. preganglionic parasymp. fibers leave as 'lesser petrosal nerve' |
| Lesser Petrosal Nerve | from 'hiatus for lesser petrosal nerve' | enters middle cranial fossa. exits skull through 'foramen ovale' to enter the infratemporal fossa |