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How does the glossopharyngeal nerve exit the skull?
What is located within the superior ganglion of IX?
Cell bodies of GSA
What is located within the inferior ganglion of IX?
Cell bodies of GVA and taste
Trace the path of the tympanic nerve until it forms the tympanic plexus?
- Leaves inferior to inferior ganglion
- Passes through tympanic canaliculus
- Reaches medial wall of tympanic cavity
- Forms tympanic plexus!
Where is the tympanic canaliculus located?
Between carotid and jugular foramen
What is the tympanic plexus made of and what does it innervate?
- Made of: GVA
- Innervates: Mucosa of middle ear cavity, internal surface of tympanic membrane
What does the remainder of the tympanic nerve turn into after leaving the tympanic plexus?
Lesser petrosal nerve
How does the lesser petrosal nerve leave the middle cranial fossa?
Where does the lesser petrosal nerve synapse and what cell bodies are found there?
- Synapses: Otic ganglion
- Cell bodies: GVE/Parasympathetic
What do the parasympathetic postganglionic fibers do after leaving the otic ganglion?
Ride with auricotemporal to go do secretomotor stuff to the parotid gland
What other type of fibers ride with the auricotemporal nerve and how do they get there and what do they do?
- Sympathetic postganglionic (GVE)
- Get there: Middle meningeal branch of the maxillary artery
- Do: Sympathetic innervation to the parotid gland
What does the auricular nerve contain, where does it go and how does it get there?
- Contain: GSA
- Goes to: Auricle and external auditory meatus
- Gets there: Riding auricular branch of vagus nerve
What does the carotid sinus nerve do adn what type of neurons does it contain?
- GVA branches to the common carotid artery bifurcation
- Innervates P-R and C-R of the carotid sinus and body
What muscle is innervated by the branchiomotor component of the IX?
How does the IX reach the pharyngeal plexus?
Passes between superior and middle pharyngeal constrictors
What happens at the pharyngeal plexus?
- Sensory innervation to the pharyngeal mucosa
- Posterior 1/3 of the tongue - taste and general sensation
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