By: David MaximoBy: David Maximo

Period: 4Period: 4

Nervous System (How Hearing Nervous System (How Hearing works?)works?)

““Inner Ear: A part Inner Ear: A part called the cochlea called the cochlea has tiny “hairs” that has tiny “hairs” that change sounds into change sounds into signals. The signals signals. The signals travel on the travel on the hearing nerve to hearing nerve to the brain and the the brain and the brain interprets the brain interprets the signals as sound signals as sound which creates the which creates the sense of hearing.”sense of hearing.”

Why can’t neurons be Why can’t neurons be repaired?repaired?

The scar tissue is The scar tissue is permanent and permanent and damaged neurons can’t damaged neurons can’t be repaired when an be repaired when an area of the brain, spinal area of the brain, spinal cord, or optic nerves, cord, or optic nerves, are filled with neurons-are filled with neurons-that are not able to that are not able to communicate well with communicate well with other neurons that are other neurons that are part of the brain or part of the brain or spinal cord that can’t spinal cord that can’t work very good. work very good.

What Are the Risk Factors for What Are the Risk Factors for Permanent Hearing Loss?Permanent Hearing Loss?

““Aging exposure to sounds over Aging exposure to sounds over years can damage the cell of your years can damage the cell of your inner ear and makeup may make inner ear and makeup may make you more susceptible to ear you more susceptible to ear damage.”damage.”

Loud noises: explosive noises, Loud noises: explosive noises, fireworks, snowmobiling, and fireworks, snowmobiling, and motorcycling can cause immediate motorcycling can cause immediate permanent hearing loss. Listening permanent hearing loss. Listening to loud music, like MP3 players, I-to loud music, like MP3 players, I-pods can cause lasting hearing loss pods can cause lasting hearing loss if you turn the volume up high. if you turn the volume up high.

Certain drugs can damage the Certain drugs can damage the inner ear, such as the antibiotic inner ear, such as the antibiotic gentamicin. Hearing loss could also gentamicin. Hearing loss could also happen if you take too much happen if you take too much aspirin. aspirin.

What Can be Done to Prevent What Can be Done to Prevent Hearing Loss?Hearing Loss?

Avoid loud noises Avoid loud noises Use ear plugs or ear Use ear plugs or ear

muffs when you go to muffs when you go to noisy events like rock noisy events like rock concerts, car races, etc.concerts, car races, etc.

Control the volume on Control the volume on your I-pod and other your I-pod and other devices that send devices that send sound directly into your sound directly into your ear. ear.

Don’t go above the Don’t go above the halfway setting on the halfway setting on the volume control. If the volume control. If the person sitting next to person sitting next to you can hear your you can hear your music, the volume is music, the volume is too loud.too loud.

Why Can’t Hearing Loss be Why Can’t Hearing Loss be Repaired? Repaired?

““Sensor neural- or “nerve” Sensor neural- or “nerve” hearing loss involves hearing loss involves damage to the inner ear. It damage to the inner ear. It can be caused by aging, can be caused by aging, prenatal and birth related prenatal and birth related problems, viral and problems, viral and bacterial infections, bacterial infections, genetics, trauma (severe genetics, trauma (severe blows to the head), blows to the head), exposure to loud noises, exposure to loud noises, the use of certain drugs, or the use of certain drugs, or fluid buildup or a benign fluid buildup or a benign tumor in the inner ear. tumor in the inner ear. Sensor neural hearing loss Sensor neural hearing loss usually can’t be repaired usually can’t be repaired surgically. It’s usually surgically. It’s usually corrected with a hearing corrected with a hearing aid.”aid.”

What Are The Most Common What Are The Most Common Types of Hearing Aids?Types of Hearing Aids?

BTE Hearing Aid “AKA” Behind The Ear Hearing Aid: BTE Hearing Aid “AKA” Behind The Ear Hearing Aid: They are one of the largest hearing aids with the They are one of the largest hearing aids with the electrical components of the hearing aid resting behind electrical components of the hearing aid resting behind the ear.  the ear. 

ITE Hearing Aid “AKA” In The Ear Hearing Aid: The ITE Hearing Aid “AKA” In The Ear Hearing Aid: The largest of the hearing aid styles, have more power and largest of the hearing aid styles, have more power and the ability to have controls on the hearing aid.the ability to have controls on the hearing aid.

ITC Hearing Aid “AKA” In The Canal Hearing Aid: These ITC Hearing Aid “AKA” In The Canal Hearing Aid: These are smaller than ITEs and offers fewer manual controls.are smaller than ITEs and offers fewer manual controls.

CIC Hearing Aid and it’s referred to ITC: The tiniest CIC Hearing Aid and it’s referred to ITC: The tiniest hearing aids, hard to remove and insert and do not hearing aids, hard to remove and insert and do not have manual controls because of their size.have manual controls because of their size.

RITE Hearing Aid “AKA” Receiver In The Ear Hearing RITE Hearing Aid “AKA” Receiver In The Ear Hearing Aids: Gained popularity in the last five years because Aids: Gained popularity in the last five years because when it’s damaged, it could be replaced at the hearing when it’s damaged, it could be replaced at the hearing aid center rather than sending it to the hearing aid aid center rather than sending it to the hearing aid manufacturermanufacturer

What Is The Best Hearing What Is The Best Hearing Aid? Aid?

The Best Hearing Aid are the ones The Best Hearing Aid are the ones that are chosen and fit for the person that are chosen and fit for the person who picks them.who picks them.

Have a one-on-one with a hearing Have a one-on-one with a hearing care professionalcare professional

Throughout the hearing aid Throughout the hearing aid evaluation, he/she will know which evaluation, he/she will know which hearing aid is best for you.hearing aid is best for you.

Standards Standards

9d 9d Students knowStudents know the functions the functions of the nervous system and the of the nervous system and the role of neurons in transmitting role of neurons in transmitting electrochemical impulses.electrochemical impulses.

9b 9b Students know Students know how the how the nervous system mediates nervous system mediates communication between communication between different parts of the body and different parts of the body and the body’s interactions with the the body’s interactions with the environment.environment.

Websites Sources Websites Sources

http://answers.ask.com/Science/Psychologhttp://answers.ask.com/Science/Psychology/how_does_the_brain_procy/how_does_the_brain_proc

http://www.hearinglosseducation.com/http://www.hearinglosseducation.com/Hearing/how-hearing-works.aspHearing/how-hearing-works.asp

http://www.eldercareteam.com/public/767.http://www.eldercareteam.com/public/767.cfmcfm

http://www.oif.org/site/DocServer/http://www.oif.org/site/DocServer/How_to_Prevent_Hearing_Loss.pdf?How_to_Prevent_Hearing_Loss.pdf?docID=7209docID=7209

http://www.mayoclinic.com/health/hearing-http://www.mayoclinic.com/health/hearing-loss/DS00172/DSECTION=risk-factorsloss/DS00172/DSECTION=risk-factors

Pictures Sources Pictures Sources

http://www.tptworkwear.co.za/http://www.tptworkwear.co.za/hearingprotection.asphearingprotection.asp

http://kezi.com/page/185336http://kezi.com/page/185336 http://www.clarityhearing.com/http://www.clarityhearing.com/

hearing_loss_baltimore_hearing_loss_ellicothearing_loss_baltimore_hearing_loss_ellicott_city_county_md.phpt_city_county_md.php

http://www.mthoodhearing.com/whatis.phphttp://www.mthoodhearing.com/whatis.php http://crowleys-http://crowleys-

classroom.wikispaces.com/Lorenzoclassroom.wikispaces.com/Lorenzo%27s+Oil+page%27s+Oil+page