LING 3P97 Lecture Notes - Lecture 8: Auditory Brainstem Response, Middle Ear, Stapedius Muscle
28 Nov 2015
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Rely greatly on skill of audiologist: using separate sources, for administration and interpretation combined with behavioral testing, just looking at the ear itself, better seeing the overall picture o. Contribute to a more complete picture of patient"s problem when. Immittance tests- looking at how well the sound travels through the ear. Auditory evoked reponses: tympanometry, acoustic reflexes, problems with the 8th cranial nerve. The two always work together and against together. Resistance; independent of frequency; doesn"t matter which frequency coming into ear, always have the same resistance. You want the resistance and reactance to be in balance: to equal one another. Adding mass to the ear, directly proportional: compliance reactance (xc) They both oppose it in 2 different ways. Resistance energy is dissipated: ligaments that support the 3 middle ear bones. Reactance- energy is stored: mass- ossicles and tympanic membrane, compliance- fluid pressure from inner ear on the base of. More mass = stiffness in tympanic membrane the stapes.
