Chapter 13: Ear Flashcards
ear
organ of hearing and balance; includes the external ear, middle ear, and labyrinth or inner ear
external ear
consists of the auricle and external auditory canal (meatus)
auricle
external, visble part of the ear; directs soundwaves into the external auditory canal
external auditory canal
short tube that ends at the tympanic membrane. the inner part lies within the temporal bone of the skull and contains the glands that secrete earwax
middle ear
consists of the tympanic membrane and the tympanic cavity containg ossicles
tympanic membrane
semitransparent membrane that separates the external auditory canal and the middle ear cavity. the tympanic membrane transmits sound vibrations to the ossicles
ossicles
bones of the middle ear that carry sound vibrations. the ossicles are made of malleus, incus, and stapes. the stapes connect to the oval window which transmits the sound vibrations to the cochlea of the inner ear
eustachian tube
passage between the middle ear and the pharynx; equalizes air pressure on both sides of the tympanic membrane
inner ear
consists of the labyrinth and connectors of the vestibular and cochlear nerves
labyrinth
bony spaces w/in the temporal bone of the skull made up of 3 distinct parts, the cochlea, the semicircular canals, and the vestibule. the cochlea facilitates hearing.
cochlea
coiled portion of the inner ear containing the sensory organ for hearing; connects to the oval window in the middle ear
semicircular canals and vestibule
sensory organs of balance; contain receptors and endolymph that provide sensory information about the body’s position to maintain equilibrium
vestibulocochlear nerves
paired cranial nerves responsible for hearing and balance; composed of vestibular fibers and cochlear fibers
vestibular nerve
conveys information about position and balance from the semicircular canals and vestibule to the brain
cochlear nerve
conveys information about sound, including volume and frequency from the cochlea to the brain
mastoid bone
portion of the temporal bone of the skull posterior and inferior to each auditory canal; contains mastoid air cells that drain into the middle ear cavity behind the external auditory canal
audi/o
hearing
aur/i
ear
cochle/o
cochlea
labyrinth/o
labyrinth
mastoid/o
mastoid bone
electr/o
electricity, electrical activity
myc/o
fungus
myring/o
tympanic membrane (eardrum)
ot/o
ear
staped/o
stapes
tympan/o
middle ear
vestibul/o
vestibule
py/o
pus
-al
pertaining to
-algia
pain
-ar
pertaining to
-ectomy
excision, surgical removal
-gram
radiographic image
-graphy
radiographic imaging
-itis
inflammation
-logist
one who studies and treats
-logy
study of
-meter
instrument used to measure
-metry
measurement
-osis
abnormal condition
-plasty
surgical repair
-rrhea
flow, discharge
-sclerosis
hardening
-scope
instrument used for visual examination
-scopy
visual examination
-tomy
cut into, incision
labyrinthitis
inflammation of the labyrinth
mastoiditis
inflammation of the mastoid bone
myringitis
inflammation of the tympanic membrane
otalgia
pain in the ear
otomycosis
abnormal condition of fungus in the ear
otopyorrhea
discharge of pus from the ear
otorrhea
discharge from the ear
otosclerosis
hardening of the ear (stapes) (caused by irregular bone development and resulting in hearing loss)
acoustic neuroma
benign tumour w/in the internal auditory canal growing from the acoustic nerve; may cause hearing loss and may damage structures of the cerebellum as it grows
cholesteatoma
cyst like mass composed of epithelial cells and cholesterol occuring in the middle ear; may be associated with chronic otitis media
ménière disease
chronic disease of the inner ear characterized by a sensation of spinning motion, ringing in the ear, aural fullness, and fluctuating hearing loss; symptoms are related to a change in volume or composition of fluid w/in the labyrinth
otitis externa (OE)
inflammation of the outer ear
otitis media (OM)
inflammation of the middle ear
ototoxicity
adverse pharmacological reaction causing damage to the vestibulocochlear nerve; results in abnormalities of hearing and balance
presbycusis
hearing impairment occurring with age
tinnitus
ringing in the ears
vertigo
sense that either one’s own body or the environment is revolving; may indicate inner ear disease
cochlear implant
pertaining to the cochlea implant
labyrinthectomy
excision of the labyrinth
mastoidectomy
excision of the mastoid bone
mastoidotomy
incision into the mastoid bone
myringoplasty
surgical repair of the tympanic membrane
myringotomy
incision into the tympanic membrane (made to relieve pressure in the middle ear by releasing pus or fluid and for the placement of tubes)
otoplasty
surgical repair of the (outer) ear
stapedectomy
excision of the stapes (performed to restore hearing in cases of otosclerosis; stapes are replaced with prosthesis)
tympanoplasty
surgical repair (of the hearing mechanism) of the middle ear
tympanostomy
creation of an artificial opening into the middle ear
audiogram
(graphic) record of hearing
audiometer
instrument used to measure hearing