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date: 23 August 2019

Abstract and Keywords

Tinnitus most commonly begins with alterations of input from the ear resulting from cochlear trauma or overstimulation of the ear. Because the cochlear nucleus is the first processing center in the brain receiving cochlear input, it is the first brainstem station to adjust to this modified input from the cochlea. Research published over the last 30 years demonstrates changes in neural circuitry and activity in the cochlear nucleus that are associated with and may be the origin of the signals that give rise to tinnitus percepts at the cortical level. This chapter summarizes what is known about these disturbances and their relationships to tinnitus. It also summarizes the mechanisms that trigger tinnitus-related disturbances and the anatomical, chemical, neurophysiological, and biophysical defects that underlie them. It concludes by highlighting some major controversies that research findings have generated and discussing the clinical implications the findings have for the future treatment of tinnitus.

Keywords: cochlear nucleus, tinnitus, plasticity, tinnitus-signaling, tinnitus mechanisms, tinnitus origins

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