ear anatomy Flashcards
A. pinna aka auricle
B. external auditory canal aka external acoustic meatus
C. tympanic membrane
A. tympanic membrane
auditory ossicles
B. malleus aka hammer
C. incus aka anvil
D. stapes aka stirrup
E. oval window
F. round window
G. eustachian tube
conductive hearing loss
- occurs when
- which ear has better hearing
- why
- tested how
- occurs when something prevents sound waves from reaching the fluids of the internal ear
- the bad ear hears better
- due to bone conduction
- tested w/ Rinne tuning fork test
sensorineural hearing loss
- which ear hears better
- tested how
- the unaffected ear hears better
- tested w/ Weber tuning fork test
static equilibrium
the special sense which interprets the position of the head permitting the CNS to maintain stability and posture when the head and body are not moving
dynamic equilibrium
the special sense which interprets balance when one is moving, or at least the head is moving
vertigo
sensation of dizziness and rotational movement when such movement is not occurring or has ceased
nystagmus
involuntary rolling of the eyes which is normal during and after rotation
A. external acoustic meatus
B. eustachian tube
C. cochlea
D. semicircular canals
E. vestibulocochlear nerve
A. semicircular canals
B. oval window
C. round window
D. cochlear duct
E. spiral organ of corti
F. vestibulocochlear nerve
G. vestibule
bony labyrinth
- filled w/ what
- includes what 3 things
- filled w/ perilymph
- semicircular canals, vestibule, cochlea
membraneous labryinth
- filled w/ what
- contains what
- filled w/ endolymph
- contains cochlear duct
the cochlear duct separates 2 chambers
- upper chamber
- lower chamber
- scala vestibuli
- scala tympani
