Cranial Nerve Intro Flashcards
What are the different axon types seen in cranial nerves
GSA GVA GSE GVE SVE SVA
What are SVE
special visceral efferent (just like GSE but the muscle is from a pharyngeal arch)
What is SVA
special visceral afferent
What do GSA neurons utilize in cranial nerves
sensory ganglia
What do GVE neurons utilize in cranial nerves
autonomic ganglia
What do GVA neurons utilize in cranial nerves
sensory ganglia
What do SVA neurons utilize
sensory ganglia
What is the major sensory nerve of the head
Trigeminal nerve CNV
What cranial nerves carry parasympathetics
CN III
CN VII
CN IX
CN X
What cranial nerves will hitch hike on CNV
GVEs from CN III, VI, IX
What nerves will the cervical plexus hitch hike on
CN III
CN XI
CN XII
What is the function of GSE
motor; to skeletal muscle only
What is the function of SVE
motor; ONLY to skeletal muscle derived from a pharyngeal arch
What is the function of GSA
sensation from body wall
What is the function of GVE
parasympathetic; motor to “viscera”
What is the function of GVA
sensation from viscera
What is the function of SVA
taste and olfaction
What is the function of SSA
vision balance and hearing
Where are cell bodies of afferent neurons found
psudounipolar cell bodies in sensory ganglia
Which afferent neuron cell body is NOT found in a ganglia
CN V, cell bodies are found in the brain stem; involved in jaw movement
What do efferent neurons innervate
skeletal muscle or viscera; motor
How many neurons will be utilized by efferent neurons
2: one in the CNS and one in peripheral ganglia
What nerves will be impacted by a vestibular nerve tumor
CN 7 and CN 8
What types of fibers are found in CN3
GSE: for skeletal m
GVE: parasympathetic
What nerve will CN3 hitch hike on
CN V1: short ciliary nerves
What part of CN3 are the parasympathetic contained in
mainly in the medial aspect of the nerve towards the outside
How might diabetes affect CN3
individuals with diabetes are susceptible to nerve infarcts that will impact the smallest vessels.
What cranial nerves will distribute to the intra and extrocular muscles
CN 3, 4, 6
What are the divisions of the trigeminal nerve
opthalmic V1
maxillary V2
mandibular V3
What does the maxillary branch do
sensory of the head (face, eyes, nasal, oral cavity)
What does the mandibular branch do
motor to muscles of mastication
What nerve will supply motor innervation the facial muscles
CN 7
What is the chorda tympanii
branch of facial nerve that passes under the ear drum and conveys taste information from the anterior part of the tongue and controls secretion of the salivary glands
What muscle is innervated by CN IX
stylopharyngeus
What nerve will receive sensory information from the carotid body/sinus
glossopharyngeal nerve
What is the typanic nerve
a branch of glossopharyngeal nerve found in the tympanic canal
What does the vagus nerve contribute to tast
root of tongue and epiglottis
What are the parasympathetic ganglia utilized by cranial nerves
COPS Ciliary: CN3 PPG: CN7 Submandibular: CN& CN10: intramural
What are the sensory ganglia utlized by the cranial nerves
TGIS9+10 Trigeminal: CN5 Geniculate: CN7 Inferior 9+10 Superior 9+10
What muscles will be innervated by cranial nerve 11
SCM
trapezius
What muscles will be innervated by CN 12
tongue muscles
Where will the spinal accessory nerve leave the skull
jugular foramen
