Abstract
Treatment of inner ear deafness is still very difficult even today except in certain cases. As mentioned above, the reason is that original sensory cells which cannot be regenerated lose their responsiveness for good to the sound of the comparable cycle once they have been degenerated and lost. It will be, therefore, the most important the cause quickly if it is ever known or to prevent the cause from getting worse.
If one has been affected by deafness unfortunately, whether the cause is known or not, it may be reversible in some cases but grow worse in others, depending on the site and degree of the damage. At any rate, it is necessary to diagnose or apprehend them properly for prevention and treatment of hearing impairment.
Discussion is made under general on the ultrastructure of the normal cochlea observed with the scanning and transmission electron microscopy as well as on pathological conditions of the cochlea induced by various causes.
