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30.03.2014

Is tinnitus otitis media, quietus tinnitus relief reviews - Within Minutes

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Definition: Tinnitus could be defined as perception of noise in the absence of acoustic stimuli.
Prevalance: Studies have shown that nearly 20% of adults experience tinnitus in one form or the other. Hearing loss: Studies conducted in Canada showed people with deafness had increased incidence of tinnitus. Tinnitus in children: Increased incidence of otitis media in pediatric age group plays an important role in high prevalance of tinnitus in children. Classification of tinnitus: One simplistic classification of tinnitus could be Subjective and Objective tinnitus. Pulsatile tinnitus: May be classified into vascular and non vascular types according to its etiology. Non vascular types of pulsatile tinnitus include palatal myoclonus, tensor tympani myoclonus, and stapedial myoclonus. Nodar's classification: This classification was based on the importance of 6 factors related to tinnitus. Subjective tinnitus can be compared to phantom sensations which occur after amputation of limb.
Auditory feed back system and its role in tinnitus generation: The optimal operation of auditory system is dependent on very sensitive and complex feed back mechanisms involving the afferent (ascending), efferent (descending) pathways. Nervous system as the site of tinnitus: Most forms of severe tinnitus have been shown to be caused by abnormal functioning of the nervous system.


Vascular contact with the intracranial portion of auditory nerve is regularly associated with tinnitus. A good history is a must for accurate diagnosis of the underlying pathology leading on to tinnitus. Etiology of objective tinnitus include: intracranial vascular anamolies, atherosclerosis of aorta, pseudotumor cerebri, chemodectomas involving the middle ear. Pitch estimation: Pitch estimation of tinnitus helps in the probable etiology for tinnitus.
Masking: Refers to the reduction of audibility of tinnitus when the patient is exposed to another sound. Factors affecting the prevalance of tinnitus include: age, gender, race, economic status, hearing loss and noise exposure.
This disorder includes a triad of symptoms which include fluctuating hearing loss, roaring tinnitus and vertigo. Infact tinnitus could be the first symptom of a vestibular schwannoma, it becomes worse after surgical removal of schwannoma. Severity of tinnitus should be assessed (ie whether present throughout the day - severe tinnitus, present only in the absence of ambient noise - night times - mild tinnitus). High pitched tinnitus is common in patients with noise induced hearing loss, and low pitched tinnitus is commonly seen in Menier's disease. This indicates that tinnitus could be generated by the brain in response to lack of normal stimuli from the auditory system.


This type of tinnitus occur due to irritation to the nerve by the offending vessel (kindling phenomenon).
Subjective tinnitus is usually high pitched and ringing in nature and can only be perceived by the patient. In Meniere's disease it is low frequency, while in noise indued tinnitus it is of high frequency. Measurments of tinnitus include assessment of the pitch, bandwidth, loudness, maskability of tinnitus and residual inhibition.
In tinnitus loudness match the patient is instructed to match the loudness of tinnitus with that of narrow band noise generated at about the same frequency as the tinnitus.
Whereas objective tinnitus is commonly pulsatile in nature and is also heard by the examiner. A single pure tone masking tone of any frequency may mask a broad band spectrum of tinnitus.
It has also been suggested that phase locking of the activity in many nerve fibers can also be a cause for tinnitus.



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