Cranial Nerves: Sensory Flashcards
What are the Special Sensory Cranial Nerves
Smell (I)
Vision (II)
Taste (VII, IX, X)
Balance/Hearing (VIII)
What are the Visceral Sensory CN?
sensory info except pain via IX and X
Olfactory Nerve
CN I
CN I function
special sensory: smell
Location of NCB of CN I
Olfactory Epi
Passage through skull of CN I
Ethmoid bone at cribiform plate
Anosomnia at _________ due to what?
CN I due to frx of cribiform plate
CN II
Optic nerve
Function is Special Sensory: vision
CN II
Location of neuron cell body of CN II
Retina
Passage through skull of CN II
sphenoid bone at OPTIC CANAL
Anopsias is what
visual field defect
What would injury to CN II cause?
anopsias
Injury at eyeball would damage what cranial nerve?
CN II
CN VIII
Vestibulocochlear
Function of CN VIII
Special sensory: hearing and balance
Location of NCB of Vestibulocochlear
Sprial Ganglion (cochlea) and vestibular ganglion
Hearing impairment or loss as well as vertigo caused by damage to what CN?
Vestibulocochlear
What type of injury would cause damage to CN VIII?
tumor
Purely Sensory Nerves:
I, II, VIII
1, 2, 8
Purely Motor Nerves:
III, IV, VI, XI, XII
3, 4, 6, 11, 12
Mixed = sensory and motor
V, VII, IX, X
GVE
III, V, VII, IX
what are collections of neuron cell bodies outside of CNS?
Ganglion
Where does spinal cord have the gray matter?
in the middle
Gray matter equals what?
neuronal cell bodies
White matter is what?
tracts; axons and dendrites
Where is the Olfactory Nerve located?
Right behind the nasal bone: microscopic structure send nerves through cribiform plate, NOT really the OLFACTOrY bulb
Olfactory Neurons are uni/bi/multipolar
Bipolar
What is special about the neurons in the olfactory nerve?
they can regenerate
Where do olfactory nerves synapse?
olfactory bulb
Where do the tracts of the optic nerve end?
Thalamus; contains the collection of neuron cell bodies
Where do the nerves of the optic nerve end?
primary occipital cortex
Where do visual field defects occur?
Primary occipital cortex
What nerves are affected by pituitary tumors?
Optic II and Olfactory I
Where does the vestibulocochlear nerve emerge from?
From the base of brain at junction of pons and medulla = pontomedullary jnx
Where are the vestibulocochlear organs located?
petrous part of the temporal bone
Where is the CN VIII sent through?
Interal acoustic meatus then into brain stem and enter the brain stem and terminate on nuclei in the deep white matter of brain stem
Vestibular portion of CN VIII innervates
vestibular apparature for balance and equilibrium
Cochlear portion of CN VIII innervates
cochlear apperature and for sense of hearing
