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Tinnitus pp 137-162 | Cite as

Cortex: Way Station or Locus of the Tinnitus Percept?

  • Jos J. EggermontEmail author
Chapter
Part of the Springer Handbook of Auditory Research book series (SHAR, volume 44)

Abstract

One extreme position for the cortical participation in the tinnitus percept is that the cortex just responds to the changing neural activity from subcortical areas in a way similar to its processing of auditory information originating in the outside world. The other extreme position is that the cortex not only initiates the tinnitus percept but also changes the activity in subcortical structures via corticofugal pathways. It is more likely that an interaction exists between changes at subcortical levels, including the auditory periphery and the thalamocortical system combined with the limbic system, that function to modulate the subcortical activity. One has to realize that even in the input layers of auditory cortex, at most 10% of this input is the result of afferent activity from the thalamus, whereas the remainder originates from other cortical layers or other cortical areas. Because there are about 13 cortical areas in primates, including humans and cats (Winer & Lee, 2007), ample opportunity exists for the cortex to continually process its own activity.

Keywords

Hearing Loss Auditory Cortex Vagus Nerve Stimulation Inferior Colliculus Noise Exposure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Department of Physiology and Pharmacology and Department of PsychologyUniversity of CalgaryCalgaryCanada

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