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Ch 17.Hearing - Hearing Hearing Disorders Chapter 17...

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Hearing & Hearing Disorders Chapter 17: Reading Guide pages 471-483 (November 21 st ) 1. parts of outer ear – Figure 17.4!! -Auricle (pinna) -Mastoid cells -Tympanic membrane -bony external auditory canal -Cartilaginous external auditory canal 2. a prenatal, a perinatal, and a postnatal cause of hearing loss in outer ear -prenatal (before birth)=illnesses or ingestion of drugs before fertilization -Perinatal (at the time of birth)= violent uterine contractions - Postnatal (following birth)= burns, frostbite, and skin cancer, trauma 3. parts of middle ear – Figure 17.5!! 4. pre, peri, post in middle ear -pre=genetic disorder, malformations -peri= severe uterine contractions/ forceps -post= otitis medie- infection of middle ear space 5. parts of inner ear – Figure 17.6!! 6. pre, peri, post in inner ear -pre= genetic disorders -peri= birth process -post=otitis media/ bacterial meningitis, viral infections, noise 7. pre, peri, post hearing loss in auditory nerve & brain - pre=maternal viral infections -peri=birth process, interruption of blood with oxygen supply -post=trauma, tumors Pages 484-497 (November 25 th ) 8. pure-tone audiometry ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 9. air conduction
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________________________________________________________________________ ________________________________________________________________________ 10. bone conduction ________________________________________________________________________ ________________________________________________________________________ 11. speech audiometry ________________________________________________________________________ ________________________________________________________________________ 12. audiogram ________________________________________________________________________ ________________________________________________________________________
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