Why Hearing Loss Causes Tinnitus
Tinnitus and hearing loss are two conditions that are often intertwined. It’s not surprising because both share common causes. In most cases, hearing loss spawns tinnitus and both change the way a person lives. A person may lose his hearing because of many factors. Too much earwax in his ear can cause conductive hearing loss. A ruptured eardrum may also cause hearing loss, just as middle ear infections would. Noise is an important cause of hearing loss, and it must be noted because it is now a leading reason why people wear hearing aids. Too much noise exposure can damage the tiny structures in the cochlea, known as stereocilia. Destruction of these sensors cause sensorineural hearing loss. Noise induced hearing loss can develop over a long span of time during which a person receives continual exposure, or it can develop right after an extreme exposure.
The development of tinnitus in people with hearing loss is not thoroughly understood by experts, but there are existing theories. It has a lot to do with how the brain compensates with the loss of aural signals. The brain compensates by tuning to other sources. Some of the neurons may also play an essential role in the perception of phantom sound. The loss of signals coming from the auditory nerve can cause activation of other neurons. Random signals fired by these neurons are interpreted by the brain as noise – tinnitus. Latest treatment for tinnitus includes laser treatment and TMS (transcranial magnetic stimulation). However, no treatment can eliminate tinnitus. It’s an incurable condition.
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