structures and functions Flashcards
it is the organ and hearing equilibrium.
ear
what are the three distinct parts of the ear?
external, middle, inner ear.
the ____ separates the external ear to the middle ear.
tympanic membrane
what is the equipment used to assess external ear and tympanic membrane?
otoscope
it is composed of the auricle or pinna, and the external auditory canal.
external ear
it is the portion of the external ear visible without any tools.
the auricle (pinna)
composed of a thin plate of yellow elastic cartilage covered by tigth-fitting skin.
auricle (pinna)
is S shaped in the adults; the outer part of the canal curves up and back
external auditory canal
a wax like substance that keeps the tympanic membrane soft.
cerumen
is a small air-filled chamber in the temporal lobe and is separated from the external ear by the tympanic membrane (eardrum)
middle ear or tympanic cavity
ha sa translucent, pearly gray appearance and serves as a partition streteched accross the inner war of the audtiroy canal
tympanic membrane (eardrum)
the nearest auditory ossicles that can be seen through the translucent membrane
handle and short process of the malleus
the base of the malleus, also serving as a center point landmark
umbo
the reflection of the otoscope light seen as a cone due to the concave nature of the membrane
cine of light
the top portion of the membrane that appears to be less taut than the bottom portion
pars flaccida
the bottom of the membrane that appears to be taut
pars tensa
what are the three auditory ossicles of the middle ear?
maleus, incus and the stapes
it is responsible for transmitting sound waves from the eardrum to the inner ear through the oval window
auditory ossicles
air pressure is equalized on both sides of the tympanic membrane by means of the ___ which connects the middle ear to the nasopharynx
eustachian tube
is fluid filled and made up of the bony labyrinth and an inner mamebraneous labyrinth
inner ear or labyrinth
what are the three parts of the bony labyrinth?
the cochlea, the vestibule and semi circular canals
it contains the spiral organ of corti, which the sensory organ for hearing
inner cochlear duct
it is located in the vestibule and in the membranous semicircular canals, sense position and head movements to hell maintain both static and dynamic equilibrium
sensory receptors
it connects with the cochlear nerve to to form the eighth cranial nerve
vestibular nerve
the transmission of sound waves through the external and middle ear is referred to as
conductive hearing
transmission of sound waves in the inner ear is referred to as
perceptive or sensorineural hearing
a conductive hearing loss would be related to a dysfunction of what part of the ear?
external or middle ear
a sensorineural loss would be related to the dysfunction of what part of the ear?
inner ear
this bone conduction, serves to augment the usual pathway of sound waves through air, bone and finally fluid.
bones of the skull
a sudden decrease in ability to hear in one ear may be associated with…
otitis media or cerumen impaction
it is a sudden deafness up to a 3 day period.
sensorineural hearing loss
what are the conductive phase
air conduction
bone conduction
sensorineural phase
