Flashcards in Quiz 3: Glossopharyngeal & Vagus N. Deck (109)
What types of information is carried in the glossopharyngeal nerve?
Motor, General Sensory, Parasympathetic Visceral Sensory and Special Sensory
T/F: C.N. IX is classified as a mixed cranial nerve.
Where does C.N. IX (glossopharyngeal) carry motor innervation?
Where does C.N. IX carry sensory information from?
Nasopharynx, oropharynx and taste information from the tongue posterior to the sulcus terminalis, uvula, and palatine tonsils. General sensation is also carried from the tympanic cavity.
Where does C.N. IX carry parasympathetic info to?
The parotid, buccal & inferior labial glands
The motor fibers carried in the glossopharyngeal nerve arise from cell bodies located in the ___________ part of the _________ ___________.
Superior, Nucleus Ambiguus
Nucleus of origin fibers carried to the nucleus ambiguus are carried in which cranial nerves?
IX, X and XI
The motor fibers carried in the glossopharyngeal nerve are catergorized as ____________ instead of somatic motor.
Branchiomotor (speaks to embryology of target)
Preganglionic parasympathetic fibers of CN IX arise from the ______ ________ nucleus.
Afferent, sensory fibers of CN IX terminate in the __________ nucleus.
Solitary (Recall CN VII)
There are how many peripheral ganglia associated with the glossopharyngeal nerve?
What are the two peripheral ganglia associated with the glossopharyngeal nerve?
Superior ganglion and Inferior ganglion
Is the inferior ganglion or superior ganglion smaller?
T/F: The superior ganglion and inferior ganglion are usually thought of as two non-related individual nuclei.
False, the superior ganglion is usually thought of as a separated part of the inferior ganglion.
Where do parasympathetic fibers of CN IX synapse?
Where do general sensory neurons have their cell bodies in CN IX?
From the inferior ganglion, sensory fibers signal are conveyed to CNS and fibers synapse in __________________________.
Spinal nucleus of the Trigeminal Nerve
Taste information from the tongue posterior to the sulcus terminalis is carried in neurons from the _________ _______.
Axons from special sensory cells (taste) synapse in the ________ part of the __________ nucleus after leaving the inferior ganglion (where cell bodies are located).
Some incoming fibers from the _________ ganglion synapse in the lower part of the solitary nucleus. These cells carry _______ ________ information from the carotid sinus and carotid body.
Inferior; visceral afferent
The _________ ________ contributes lower motor neurons to three cranial nerves (IX, X, XI).
Axons from lower motor neurons carried in C.N. ____ will innervate the stylopharyngeus muscle.
The inferior salivary nucleus gives rise to __________ ___________ axons carried in the glossopharyngeal nerve.
Preganglionic parasympathetic axons carried in CN IX synapse in the ________ ganglion.
From the otic ganglion, postganglionic fibers supply what?
Parotid, buccal and inferior labial glands
What is the apparent origin of the glossopharyngeal nerve?
Lateral aspect of Superior M.O.
Where does CN IX exit the skull?
Where is the superior ganglion (of CN IX) located?
Inside the cranium
Where is the inferior ganglion (aka Petrosal ganglion) (of CN IX) located?
Beyond jugular foramen, outside the cranium