Cranial Nerves and Hearing Flashcards
CN 1
olfactory
smell
sensory
CN 2
optic
vision; pupillary and accommodation reflexes
sensory
CN 3
oculomotor
motor- moves eye up, down, medially, raises upper eyelid, efferent for vestibulo-ocular reflex
motor
CN 4
trochlear
motor
moves eye medially and down; efferent for vestibulo-ocular reflex
CN 5
trigeminal
sensory and motor
sensory to face
closing mouth
CN 6
abducens
motor
abducts the eye
CN 7
facial
sensory and motor
facial muscles, tongue taste (ant 2/3), tears, salivation
CN 8
vestibulocochlear
sensory
sensation of head position relative to gravity and head movement
CN 9
glossopharyngeal
sensory and motor
sensation from pharynx, tongue, middle ear, afferent for gag and swallowing reflexes. constricts pharynx, salivation
CN 10
vagus
sensory and motor
sensation from pharynx, larynx, skin in external ear. regulates swallowing and speech, efferent for gag and swallowing reflexes. regulates viscera
CN 11
spinal accessory
motor
elevates shoulders and turns head
CN 12
hypoglossal
motor
moves tongue
azimuth coordinates…
position left to right
elevation coordinates
position up and down
medial superior olive
measures time and difference
lateral superior olive
measuring difference in sound intensity between the ears
auditory association cortex
compares sounds with memories of other sounds then categorizes them as language, music, or noise
Wernicke’s area
where comprehension of spoken language occurs
conductive
deafness occurring when transmission of vibrations is prevented in the outer or middle ear
sensorineural hearing loss
deafness due to damage of the receptor cells or cochlear n
presbycusis
age related hearing loss
tinnitus
infrequent, mild, and high-pitched ringing that lasts for seconds to minutes
perilymph fistula
occurs when opening occurs between middle and inner ear; allows perilymph to leak from inner into middle ear
