1) What is a simple way conduction deafness can be simulated? Explain how this simulates conduction...

1) What is a simple way conduction deafness can be simulated? Explain how this simulates conduction deafness. Is there a simple way to simulate nerve deafness? Why or why not?

2) Compare nerve deafness to conduction deafness.

3) In your own words, describe how the procedure for the Rinne's Test differs from the procedure for the Weber's test. What type of a result would you see from each of these tests if an individual had normal hearing?

Solutions

Expert Solution

1)CONDUCTION DEAFNESS: It is seen when there is probelm in conducting sounds and the problem is in Outer Ear, Tympanic Membrane (Ear Drum) and Middle Ear (Ossicles).

Normally Sound waves first enter the ear and goes through middle ear then hits the inner ear where these waves are sent to brain by Auditory Nerve.
But in Conduction deafness,the Sound Waves cannot travel to the inner ear because of damage to middle ear or outer ear so they are not able to hear the outer sounds but able to hear the inner sounds like digestion,chewing..
Conduction Deafness is simulated by plugging the ears or covering the ears with cloth or blocking with fingers.Observe the sounds when ears are unplugged, the people with conductive deafness cannot hear the sounds from outside and again observe the sounds when ears are plugged and talking himself lnside loudly can able to hear.

NERVE DEAFNESS: It is a type of hearing and the problem is in Inner Ear,Sensory Organs (Cochlea) and Vestibulocochlear Nerve.

Nerve deafness also causes Balance problems because of the involvement of Semicircular Canals in Inner Ear,Cochleaand Vestibulocochlear Nerve.
Nerve Deafness is simulated by using Plugging of ears and Romberg Test(Ask the subject to stand Erect with feet together and eyes closed.Positive Romberg Test- Sways or falls with eyes closed,Negative Romberg Test - Stand Erect with no swaying or falling) .The person not able to hear the sounds from outside and inside along with Positive Romberg Test .

CONDUCTION DEAFNESS	NERVE DEAFNESS
Involvement of Outer and Middle Ear	Involvement of Inner ear and Nerve
Outer sounds are not audible and Inner sounds are audible	Both Inner and Outer sounds are not audible
No Balance Problems	Balance Problems are observed
Romberg Test is Negative	Romberg Test is Positive
Causes are Ear Infections,Head Colds,Tumors,Allergies	Causes are Aging,Side effects of medication,Frequent Exposure to Loud Noises, Head Trauma,Genetics

3) Weber's Test: It is used to determine the unilateral conduction and nerve deafness. In this, the tuning fork is placed on the top of the head with equidistant from ears.

	Normal	Conductive Deafness	Nerve Deafness
Response	Sounds are equally heard on both sides	Affected ear hear the sounds strongly than the normal ear	Normal Ear sounds better and affected ear sounds lesser than normal

Rinne's Test: It is used for comparing bone conduction and air conduction.In this,the tuning fork is placed on the mastoid process if the person says the vibration is stopped then the tuning fork is moved to the ear pinna then the person hear vibrating as the air conduction is greater than bone conduction.

	Normal	Conductive Deafness	Nerve Deafness
Response	Able to hear after placing near ear pinna	Not able to hear after placing near ear pinna (bone conduction is greater than air conduction)	Not able to Hear on mastoid process and near ear pinna (Air and Bone Conduction are Diminished)

Sydney Mullin answered 1 year ago

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