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  Defects of the ear

Defects of the ear:

Numerous defects of the ear lead to hearing failure or even deafness. Hearing loss, or hearing impairment, occurs whenever there is a problem with one or more portions of the ear or ears.

Types of Hearing Loss:

There are some different kinds of hearing loss: Conductive, sensory, mixed (i.e., conductive and sensory combined), and neural.

Conductive hearing loss:

This occurs when there is a trouble with a part of the external or middle ear. Most of the kids with conductive hearing loss have mild hearing loss and it is generally temporary since in most of the cases medical treatment can aid.

Sensory hearing loss:

This occurs whenever the cochlea is not working correctly as the tiny hair cells are damaged or smashed. Depending on the loss, a person might be capable to hear most sounds (however they would be muffled); only a few sounds; or no sounds at all. Sensory hearing impairment is approximately always permanent and the capability to talk normally might be affected.

Neural hearing loss:

This occurs whenever there is a problem with the connection from the cochlea to the brain. The hearing loss might be congenital or due to middle ear fluid, severe infections, like head injury, meningitis, listening to very loud music, particularly through headphones, recurring exposure to loud sounds, like machinery.

One of the general causes of conductive hearing failure is blockade of the exterior auditory meatus with wax secreted from ceruminous glands in the skin lining the meatus. In a few people wax accumulates in the meatus and hardens, at times pressing against the eardrum. Common hearing is generally restored after the hardened wax is eliminated with a special syringe.

The other cause of conductive hearing loss is a perforated eardrum. Perforation can be caused by infection in the middle ear or by mechanical injury resultant from a close explosion or an unexpected blow to the head. Injury to the head can also cause ossicles of the middle ear to become detached from one another, therefore breaking the conductive pathway to the cochlea.

Breakdown of the cochlea and acoustic nerve can be the cause of hearing loss, even although vibrations are conducted absolutely into the inner ear. This hearing loss is termed as sensorineural (i.e., perceptive) hearing loss. Acquired forms of this situation can outcome from infection, head injury, blast from explosions or exposure to extreme sound.

 

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