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Tinnitus
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Tinnitus could be explained by abnormal neural activity in the auditory nerve fibers, which may occur if there is a partial breakdown of the myelin covering of individual fibers. A defect in the hair cell would trigger the discharge of connected nerve fibers. For chronic cochlear disorders, there may ... be increased spontaneous activity in the hair cells and neurons resulting in tinnitus. In the auditory nerve there are two different kinds of afferent fibers: Inner hair cell fibers with large diameters and outer hair cells fibers with small diameters. Thus, loss of signals from the cochlea might trigger tinnitus as a manifestation of a functional imbalance between the two sets of fibers. In addition, other abnormal changes of the cochlear fluids may result in tinnitus.
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Tinnitus ("TIN-a-tus" or "Tin-EYE-tus"), more commonly spoken of as "ringing in the ears" or "head noise," has been experienced by almost everyone at one time or another. It is defined as the perception of sound in the head when no external sound is present. In addition to "ringing," head noises have been described as hissing, roaring, pulsing, whooshing, chirping, whistling and clicking. Ringing and head noises can occur in one ear or both ears, and can be perceived to be occurring inside or outside the ear. It can accompany hearing loss. It can exist independent of a hearing loss.
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Tinnitus