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MedTerm Mod 17 *Ear*

Terms, Abbreviations, & Meanings

AD right earLatin: auris dextra
AOM acute otitis media
AS left earLatin: auris sinistra
EENT eyes, ears, nose & throat
ENG electronystagmography
ENT ears, nose, & throat
HEENT head, eyes, ears, nose & throat
PE tube pressure-equalizing tube
SOM serous otitis media
acoustic pertaining to hearing
auditory canal channel leading from ear flap to eardrum
auditory meatus about an inch in length, is a slender canal lined with glands that secrete cerumen
auditory nerve fibers carry impulses from inner ear to cerebral cortex
auditory tube channel between middle ear & throat; eustachian tube
aural pertaining to the ear
auricle skin-covered cartilaginous flap, projects from the side of the head; pinna
cerumen ear wax; lubricates the ear and prevents the entry of foreign particles into internal portions of ear
cochlea snail-shaped, spirally wound tube in inner ear
contains hearing-sensitive receptors cochlea
cochlear pertaining to cochlea
deafness loss of ability to hear
endolymph fluid within labyrinth of inner ear, conducts cound waves
eustachian tube channel between middle ear & throat; auditory tube
incus small, anvil-shaped ossicle in middle ear
the second ossicle is the incus
labyrinth maze-like series of canals of inner ear
cochlea, vestibule & semicircular canals make up the labyrinth
malleus hammer-shaped, small ossicle in middle ear
ossicle small bone
malleus, incus, & stapes make up the ossicles of middle ear
otic pertaining to the ear
oval window membrane between middle & inner ears
perilymph fluid contained in labyrinth
pinna outer ear flap; auricle
postauricular pertaining to behind the ear
salpingopharyngeal pertaining to eustachian tube & throat
semicircular canals passageways in inner ear that are associated with maintaing equilibrium
stapes small, stirrup-shaped bone in middle ear
third ossicle stapes
tympanic membrane shiny, oval, semitransparent membrane between outer & middle ear
eardrum is another name for the tympanic membrane
vestibule central cavity of labyrinth, connecting cochlea & semicircular canals
vestibulocochlear pertainings to vestibule & cochlea
ear serves dual functions as a sense organ hearing & equilibrium
anatomical regions of th ear outer, middle, and inner
outer ear consists of auricle & auditory meatus
lies at the end of the external auditory canal and at the entry to the middle ear tympanic membrane
articulate with one another ossicles
provides for an equalization of air pressure between middle ear & external atmosphere eustachian tube
membranous labyrinth contains a protein-rich fluid called endolymph and is surrounded by the bony labyrinth
bony labyrinth contains a clear liquid known as perilymph & surrounds membranous labyrinth
organ of Corti sensitive receptor whose hair cells relay sound waves to auditory nerve fibers
ogran of Corti is located in the cochlea
auditory nerve fibers convey impulses to the auditory region of the cerebral cortex from the organ of Corti
The term cochlea means snail
Sound waves, conducted by air, enter the ear with the aid of the auricle
sound waves entering the auricle, are conducted along the auditory meatus to the tympanic membrane
when the taut tympanic membrane recives sound waves it begins to vibrate
vibrations by the eardrum move the ossicles
ossicle amplfiy sound waves & conduct them through the middle ear to the oval window & into inner ear
sounds coming through oval window are picked up by sensory hair cells of cochlea,
structures of the ear involved in maintaining equilibrium are found in the vestibule & semicircular canals
Sensitive hair cells and fluid within these structures allow detection of changes in the position of the head
Movement of the hair cells within the ___ generate nerve impulses macula
communicate through the brain to the body's muscles and provide for the recovery of balance hair cells within macula