comd 442 midterm
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Created by:
comdgirl09 on February 21, 2009
Subjects:
communication disorders, byu, speech language pathology, audiology
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30 terms
Terms | Definitions |
|---|---|
 anotia | absence of pinna |
| atresia | closing off of ear canal |
| stenosis | narrowing of EAC |
| microtia | small ear/pinna |
| supernumerary hillocks | ear tags |
| aural discharge | ear wax, clear fluid-trauma, cloudy fluid, blood, foreign bodies |
| bony growths | exotoses (multiple growths), osteoma (single growth) |
| inflammatory conditions | otitis externa, perichondritis (wrestler's ear), furuncle (pimple) |
| conductive system best assessed | visually, tympanometry |
| tympanometry measures | tympanic membrane mobility, ME pressure, static compliance (mass, friction, stiffness), patency of PE tubes, ear canal volume |
| static compliance | mass - ossicles, friction - muscles and ligaments, stiffness - footplate of stapes |
| anamolies of ME occur with | atresia, cleft palate, microtia; often corrected by surgery |
| anamolies of ME include | abnormalities, fusion/absence of ossicles |
| malformations of the inner ear | michel aplasia (inner ear/auditory nerve fail to fully develop), mondini aplasia (incomplete development of inner/middle/outer ear), scheibe aplasia (most common, membranous portion of cochlea-stria vascularis-organ of corti) |
| meningitis | hearing loss noted during first 2 weeks of illness, sensorineural loss, associated with upper respiratory infections, diagnose quickly, watch carefully-->cochlear implant possible, ABR/behavioral testing |
| toxoplasmosis | rare, fatal, undercooked meat, premature birth, CPalsy, blindness, hydrocephaly, appear normal at birth but symptoms appear later on; 2-7/1000 women affected, 30-40% the fetus infected as well |
| Other.... syphilis | STD, CNS abnormalities, sensorineural hearing loss; by age 2 hearing loss shows |
| Rubella | viral, 50% of time hearing loss occurs, may cause heart disease, eye problems; immunizations key |
| CMV - cytomegalovirus | most common, harmless to most ppl, causes vision problems, seizures, death, dev/cog. delays, transmitted through breast milk; up to 10-40% of children are carriers; no known treatment |
| Herpes simplex virus | genital herpes/STD, mother's first outbreak during pregnancy, sensorineural loss, 50% mortality rate |
| ototoxicity | drugs that cause damage, but save life (aminoglycosides, chemotherapy drugs, aspirin/quinine, loop diuretics(if with other ototoxicity drugs will cause problem) |
| presence of OAEs | little or no conductive loss from ME abnormality; normal OHC function; with sensorineural loss = disorder is retrocochlear |
| absence of OAEs | with conductive loss = does not eliminate possibility of cochlear/retrocochlear loss; with sensorineural loss = confirms cochlear pathology, but doesn't rule out retrocochlear |
| assessment of neural system | measures of temporal and processing aspect; brain imaging; AEPs |
| Types of AEPs | ECoG, ABR, AMLR, ALR, P300 |
| ECoG | patients sleeping, SP(IHCs), AP(distal portion of 8th nerve, IHC-Spiral ganglion), CM(OHCs); 1.5-2ms |
| ABR | 2-10ms; 8th nerve; screening |
| AMLR | 12-60ms; auditory thalamus, primary auditory cortex; awake |
| ALR | 75-200ms, awake, auditory cortex |
| P300 | 200-600ms, APD, awake, medial temporal lobe |
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