(E3) 2 - Tongue Innervation Flashcards
Schroeder
The trigeminal nerve emerges from _____
Pons
Trigeminal nerve CN V has _______ fibers (be specific which branch)
motor and sensory
Just Mandibular Nerve
- General Sensory and Branchial Motor
The trigeminal nerve has nuclei and a ganglion. (name them)
Mandibular nerve (CN V3) is one nerve that courses on ______ then through _______
lateral wall of the cavernous sinus
then through foramen ovale
Semilunar ganglion is found ______
on the wall of the cavernous sinus
Describe the Semilunar (trigeminal) ganglion
General sensation from the anterior 2/3 (oral part) of the tongue is conveyed by _____
Lingual nerve (branch of V3)
________ neurons have cell bodies located in semilunar (trigeminal) ganglion
Pseudounipolar
________ projects back to main
sensory nucleus of trigeminal nerve
Central process
Facial nerve emerges from brainstem at ________
ventrolateral pontomedullary junction (next to vestibulocochlear nerve)
- side of brainstem where pons and medulla meet
The facial nerve has _____ fibers
Facial nerve has 2 motor nuclei and a sensory ganglion. Name them.
Is there a facial only sensory nucleus within the CNS
NO
Facial Nerve: General sensory fibers project to ________ and taste fibers project to the _______
- trigeminal nuclei
- solitary nucleus
Superior salivatory nucleus carries ________ fibers to ________
- parasympathetic
- submandibular and sublingual salivary glands (and others)
Facial nucleus carries motor fibers to _____
facial muscles
Geniculate ganglion conveys sensory fibers from ______
tongue (taste) and ear structures
Describe the Geniculate Ganglion
Chorda tympani branches FROM _________ nerve within _______ bone
- facial
- temporal
Facial nerve (enters) skull through __________
internal acoustic meatus
Some fibers of facial nerve are technically separate as _________
intermediate nerve
Describe the Intermediate Nerve (what does it carry)
Facial nerve enters skull through internal acoustic meatus with ________
vestibulocochlear nerve
_________ is branch of facial nerve that courses in between facial and vestibulocochlear nerves
Intermediate nerve
Describe the course of motor fibers of the facial nerve and what they innervate.
Describe the branching and course of Chorda Tympani.
What does Chorda Tympani join with and what does it contain?
Submandibular Ganglion
Greater Petrosal Nerve - Where does it come from and where does it convey sensation?
Taste conveyed from the tongue towards the CNS. Describe the course of the taste fibers.
Taste fibers have cell bodies located in ______
geniculate ganglion
Describe the course of parasympathetic fibers to submandibular and sublingual glands. (opposite direction of taste fibers)
Where does the Glossopharyngeal nerve emerge?
from the lateral medulla just superior to the vagus nerve
Both glossopharyngeal and vagus nerves pass through _______
jugular foramen (with accessory nerve and internal jugular vein)
What type of fibers does the Glossopharyngeal nerve have?
Glossopharyngeal nerve has nuclei and ganglia. Name them
Glossopharyngeal Nerve: What does the inferior salivatory nucleus convey?
Parasympathetic fibers to glands
Glossopharyngeal Nerve: What does the nucleus ambiguous convey?
Motor fibers to stylopharyngeus muscle
Describe the location of the Glossopharyngeal Ganglia
Describe the course of the Glossopharyngeal Nerve
Glossopharyngeal nerve passes between _______
internal jugular vein and internal carotid artery
Glossopharyngeal nerve passes deep to hyoglossus muscle into ______ between ______
Glossopharyngeal nerve conveys sensation and taste from ________
posterior 1/3 (pharyngeal part) of tongue
Superior glossopharyngeal ganglion has cell bodies for ______
general sensation
Inferior glossopharyngeal ganglion has cell bodies for _____
taste
Glossopharyngeal: All fibers run through both ganglia back to ______ for taste and main _______ for sensation.
- solitary nucleus
- sensory trigeminal nucleus
Describe the course for taste from the posterior 1/3 of the tongue
Describe the course for general sensation from the posterior 1/3 of the tongue
Motor innervation to tongue is from _____ nerve (palatoglossus is innervated by ______ nerve)
- hypoglossal
- vagus
What sensory nerves innervate the tongue?
What nerves convey taste from the tongue?
IMAGE - Tongue Inenrvation
Vagus nerve emerges from _____
What type of fibers does the vagus nerve have?
Internal Laryngeal Nerve
Vagus Nerve: GENERAL SENSATION
- course, cell body location, and central process
Vagus Nerve: TASTE
- course, cell body location, and central process
