The word tinnitus comes from "Tinnituae 'Latin word meaning ring. Tinnitus, commonly known as ringing in the ear, essentially a disorder, is characterized by the sensation of noise in the human ear in the absence of external sound. Although it is defined as ringing noise, it varies greatly from person to person. In some cases, it can also be heard as a buzzing, humming, hissing, or beeping, whistling, or ticking, roaring, and clicking noise.

This is not a disease but a causal link from table of underlying causes such as ear infection, deposition of wax in the ear or injury to the tympanic membrane. Anatomically, the human ear is classified further into four sections: the outer ear, middle ear, inner ear and brain. Tinnitus can occur in any of these sections. In addition, it can occur in single or in both ears.

Some cases are considered normal. For example, if we go into a soundproof booth, then most of us will experience buzzing or whistling and become aware of the body seems normal that the masking effects of external sound is nonexistent in such cases. These conditions are defined as non tinnitus conditions. Thus Tinnitus is that medical term which describes severely affected cases of ear ringing in normal conditions.   http://www.healthreviewspot.com/



Diagnosis

As tinnitus is a subjective phenomenon, objective tests, such as audiometric testing can not measure the severity. Rather, it is classified into different categories, ranging from slight to cataclysmic, subject to practical difficulties, such as disturbed sleep, normal activities it imposes. The more descriptive THI (Tinnitus Handicap Inventory) is commonly used to do research in this area. However, certain series of diagnostic tests like audiogram, ABR (Auditory Brainstem Response) are preferred to find the cause of tinnitus or whether it because of dizziness or hearing loss. Sometimes these patterns help doctors to diagnose.

Mechanism

Hair inner ear houses minute like structures that vibrate with the introduction of sound waves. Receptor cells at the base of these hairs then transmits neural signals to the brain. These cells are connected via neural loop and controlled by the brain. This neural feedback loop makes selectivity to certain frequencies possible. Damage to receptor cells results in changing the parameters of the loop by continuous exposure to excessive decibel levels than normal and tinnitus occurs. Thus in Tinnitus, false information is transmitted to the brain causing ringing or buzzing when there is no noise as external. Recent research has classified this disorder into two ...
Otic tinnitus, what happens in the inner ear due to nerve damage.
Somatic Tinnitus, which happens outside of the inner ear
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