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Inferior (petrous) ganglion. Ganglion inferius [[extracraniale]]. Larger ganglion situated directly below the jugular foramen. It contains cell bodies of afferent fibers. B C

Tympanic nerve. N. tympanicus. First branch of the IX nerve. It branches off from the inferior ganglion and passes between the jugular foramen and carotid canal, then through the tympanic canali-culus to the tympanic cavity. C Tympanic englargement (ganglion). In-tumescentia tympanica (ganglion tympanicum). Irregularly scattered ganglion cells forming a dilatation in the course of the tympanic nerve. C Tympanic plexus. Plexus tympanicus. N. plexus in the mucosa over the promontory. It is formed by the tympanic n., internal carotid plexus and communicating ramus of the facial n. with the tympanic plexus. C

Tubal branch of tympanic plexus. Ramus tubarius (tubalis). Ramus for the auditory tube. C Caroticotympanic nerves. Nn. caroticotympanici. Sympathetic fibers of the tympanic plexus derived from the internal carotid plexus. C Communicating branch of glossopharyngeal nerve with auricular branch of the vagus nerve. Ramus communicans [cum ramo auriculari nervi vagi]. Fine branch from the inferior ganglion to the auricular ramus of the vagus. B Pharyngeal branches of IX nerve. Rami pharyn-geales (pharyngei). Three to four rami passing into the pharyngeal plexus. B

Ramus to stylopharyngeus muscle. Ramus m. stylo-pharyngei. B

Branch to carotid sinus. Ramus sinus carotici. It also passes to the carotid body and communicates with the sympathetic trunk and vagus nerve. B Tonsillar branches. Rami tonsillares. Branches supplying the mucosa of the palatine tonsil and its surroundings. B

Lingual branches. Rami linguales. Taste fibers from the posterior third of the tongue including the va-latepapillaewhicharealsosuppliedbythelingual nerve via the chorda tympani. B Otic ganglion. Ganglion oticum. Parasympathetic ganglion located medial to the mandibular nerve below the foramen ovale. It receives preganglionic fibers from the glossopharyngeal nerve via the lesser petrosal nerve and sends postganglionic secretory fibers to the parotid gland. D Lesser petrosal nerve. N. petrosus minor. Nerve containing parasympathetic fibers from the glos-sopharyngeal nerve. Itemerges from the tympanic plexus, penetrates the anterior wall of the petrous temporal bone and leaves the middle cranial fossa through the sphenopetrosal fissure. Its fibers synapse in the otic ganglion. C D

Communicating branch with the meningeal branch. Ramus communicans [cum ramo meningeo]. D

Communicating branch with auriculo-tem-poral nerve. Ramus communicans [cum n. auriculotemporali]. It includes postganglionic parasympathetic fibers that supply the parotid gland. D

Communicating branch with chorda tympani.

Ramus communicans [cum chorda tympani]. It contains sensory nerve fibers. D

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Essentials of Human Physiology

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