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Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
Functions and disorders of the ear
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Functions and disorders of the ear

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Functions and disorders of the ear

Functions and disorders of the ear

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  • Pinna collects sound waves and directs the sound waves into the auditory canal. Auditory canal is an area which contains cerumen (wax) to protect the ear. It also is a pathway for sound waves to travel through to get to the middle ear. Tympanic membrane is a membrane which seperates the outer and middle ear. (SHOW MODEL)
  • Ossicles transmit sound waves from the ear drum into the inner ear malleus incus stapes Eustachian tubes function as a way to equalize the air pressure in the middle ear with the outside atmosphere.
  • Cochlea- converts vibrations into neuron impulses that are sent to the brain Semicircular canals-detect movement of the body in space
  • Sound waves-pinna-auditory canal-tympanic membrane-ear ossicles- stimulate the receptors in the cochlea- cochlear nerve-temporal lobe of the brain for interpretation. Pathway of equilibrium Head movement- stimulates equilibrium receptors in semicircular canals and vestibule chamber- vestibular nerve-cerebellum of the brain for interpretation Decibels is the measurement of sound (how loud)
  • Faintest noise u can hear is db and the noise from a jet engine or a shotgun blast is 165db. Exposure to over 90 decibels (busy city traffic noise) for 8 hours may be dangerous to your hearing. At 100 db, the noise level of a chain saw, it would take 2 hours to cause the same damage to your hearing. Protect your hearing by turning down the volume on the radio, find a quiet place and wear earplugs or noise cancelling headphones.
  • Otoscope ENT
  • External ear swollen Trauma to the ear
  • Infection in the middle ear S&S is usually earache or ear pain Often seen in children due to the very short distance between your eustachian tubes and the pharynx. Tx- antibiotics for infection Myringotomy (tubes in the ears) to drain fluids or pus
  • Inherited disorder in which the bone stapes in the middle ear first becomes spongy and then hardens. This causes the stapes to become fixed or immovable. Common cause of deafness in young adults It totally replaces the stapes so the person can once again have a functioning stapes and to restore hearing.
  • A condition that affects the semicircular canals in the inner ear. Cause is unknown. Symptoms include vertigo (dizziness), nausea, vomiting, and tinnitus Tx with bedrest, medications, reduce stress , avoid salt caffeine and nicotine. Eat a well balanced diet and drink plenty of water.
  • Tinnitus – page 201 in text
  • A condition that causes deafness due to the aging process. The elderly. Tx is hearing aid Conductive hearing loss- occurs when sounds to the inner ear are blocked by ear wax or a build up of fluid in the middle ear or abnormal bone growth Sensory hearing loss occurs when there is damage to the inner ear or auditory nerves. Results in partial or complete deafness. Cochlear implants may help to restore hearing
  • Rinne- conductive hearing Weber- sensorineural hearing
  • Transcript

    • 1. 3.04 Functions anddisorders of the ear3.04 Understand the functions anddisorders of the sensory system1
    • 2. 3.04 Understand the functions anddisorders of the sensory system3.04 Understand the functions anddisorders of the sensory system2Essential Questions•What are the functions of the sensory system?•What are some disorders of the sensory system?•How are sensory system disorders treated?•How do you relate the body’s communication tothe sensory system?
    • 3. Understanding thefunctions of the ear:Hearing3.04 Understand the functions anddisorders of the sensory system3
    • 4. Understanding thefunctions of the earExternal earExternal earPinna/AuriclePinna/AuricleExternal auditoryExternal auditorycanalcanal Contains cerumenContains cerumenTympanicTympanicmembranemembrane3.04 Understand the functions anddisorders of the sensory system4
    • 5. Understanding thefunctions of the earMiddle earMiddle earOssiclesOssicles MalleusMalleus IncusIncus StapesStapesEustachianEustachiantubetube3.04 Understand the functions anddisorders of the sensory system5
    • 6. Understanding thefunctions of the earInner earInner earCochleaCochleaSemicircularSemicircularcanalscanals3.04 Understand the functions anddisorders of the sensory system6
    • 7. Understanding thefunctions of the earPathway ofPathway ofhearinghearingTrace the pathwayTrace the pathwayof hearing.of hearing.What are decibels?What are decibels?3.04 Understand the functions anddisorders of the sensory system7
    • 8. Understandingthefunctions ofthe ear3.04 Understand the functions anddisorders of the sensory system8Review thepathway ofhearing
    • 9. Healthy Hearing3.04 Understand the functions anddisorders of the sensory system9How do you protect your hearing?
    • 10. Understanding thefunctions of the earSound ActivitySound Activity3.04 Understand the functions anddisorders of the sensory system10
    • 11. Disorders of the ear3.04 Understand the functions anddisorders of the sensory system11
    • 12. Disorders of the ear3.04 Understand the functions anddisorders of the sensory system12
    • 13. Disorders of the earExternal otitis3.04 Understand the functions anddisorders of the sensory system13Discuss what you see inthis picture? (Besides a Q-tip!)What causes external otitis?
    • 14. Disorders of the earOtitis mediaOtitis mediaWhat is otitis media?What is otitis media?Who is most atWho is most atrisk of havingrisk of havingotitis media? Why?otitis media? Why?What are the treatmentWhat are the treatmentoptions?options?3.04 Understand the functions anddisorders of the sensory system14
    • 15. Disorders of the earOtosclerosisOtosclerosisWhat is it?What is it? Oto- sclerosisOto- sclerosisWhat causes it?What causes it?Why is a stapedectomyWhy is a stapedectomyuseful in treatinguseful in treatingotosclerosis?otosclerosis?3.04 Understand the functions anddisorders of the sensory system15
    • 16. Disorders of the earMeniere’s diseaseMeniere’s diseaseWhat are theWhat are thesymptoms ofsymptoms ofMeniere’s disease?Meniere’s disease?What causes theseWhat causes thesesymptoms?symptoms?How is it treated?How is it treated?3.04 Understand the functions anddisorders of the sensory system16
    • 17. Disorders of the earTinnitusTinnitusWhat is tinnitus?What is tinnitus?Explain this statement:Explain this statement:Tinnitus is a symptom,Tinnitus is a symptom,not a disorder.not a disorder.3.04 Understand the functions anddisorders of the sensory system17
    • 18. Disorders of the earPresbycusisPresbycusisWhat isWhat ispresbycusis?presbycusis?Who is most likelyWho is most likelyto developto developpresbycusis?presbycusis?3.04 Understand the functions anddisorders of the sensory system18
    • 19. Testing for hearing loss3.04 Understand the functions anddisorders of the sensory system19Weber testRinne testCompare these two tests.How are they diagnostic?
    • 20. 3.04 Understand the functions anddisorders of the sensory system3.04 Understand the functions anddisorders of the sensory system20Essential Questions•What are the functions of the sensory system?•What are some disorders of the sensory system?•How are sensory system disorders treated?•How do you relate the body’s communication tothe sensory system?
    • 21. 3.04 Functions anddisorders of the earThe EndThe End3.04 Understand the functions anddisorders of the sensory system21

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