Development of the Nervous System - Auditory System - Effects of Damage to the Auditory System

3 important questions on Development of the Nervous System - Auditory System - Effects of Damage to the Auditory System

How rare is total deafness and why?

It occurs in only 1% of the individuals, this is probably because when one auditory pathway doesn't work anymore, another pathway takes over. 

What are the two common classes of hearing impairment?

1. Conductive Deafness

2. Nerve deafness --> More interesting! 

What is the major common source for nerve deafness?

Loss of haircell receptors.

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