audiology week 4
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This 2 page Class Notes was uploaded by Alicia Notetaker on Sunday February 21, 2016. The Class Notes belongs to CDS 290LEC at University at Buffalo taught by Wei Sun in Spring 2016. Since its upload, it has received 13 views.
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Date Created: 02/21/16
Lecture 7 audiology -outer hair cells: increased sensitivity of vibration -positive cell ions come into celldepolarize -afferent: ear to brain, efferent: brain to ear 1) like a microphone, have to transfer voice w mechanical movement into electrical signals -sensory cells: hair cells, lose them: brain won’t receive any signals -most hearing loss is because of cells -tumor: can feel the signal(cochlea is functioning) - but can’t hear anything -when have a problem in only one ear, there might be something wrong because when people have congenital hearing loss or due to sound exposure it will usually be in both ears 2) –most speech perception is in auditory cortex(memory center) -limbic system: perception of sound(the way you react to sound, what sounds you like and don’t like) -auditory cortex: can control what sounds you hear and what sounds you suppress -longer duration from peak 1 to peak 5, the sound comes to cochlea but then has trouble reaching the next position 3) general area 4) 5) stem is made of bundle of neuron fibers 6) #4 is very long tone 7) 8) 9) efferent: nerve is bigger for outer hair cells and direct contact to outer hair cells -inner hair cells have no motility 10) 11) 12) 13) 14) have different shapes 15) 16) 17) direct connection to memory center 18) 19) Lecture 8 1) 2) 3) specific location along cochlea 4) 5) 6) 7) 8) placed behind mastoid 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20)
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