The thalamus and tinnitus: Bridging the gap between animal data and findings in humans

Elouise A. Koops*, Jos J. Eggermont

*Corresponding author for this work

    Research output: Contribution to journalReview articlepeer-review

    11 Citations (Scopus)
    66 Downloads (Pure)

    Abstract

    The neuronal mechanisms underlying tinnitus are yet to be revealed. Tinnitus, an auditory phantom sensation, used to be approached as a purely auditory domain symptom. More recently, the modulatory impact of non-auditory brain regions on the percept and burden of tinnitus are explored. The thalamus is uniquely situated to facilitate the communication between auditory and non-auditory subcortical and cortical structures. Traditionally, animal models of tinnitus have focussed on subcortical auditory structures, and research with human participants has been concerned with cortical activity in auditory and non-auditory areas. Recently, both research fields have investigated the connectivity between subcortical and cortical regions and between auditory and non-auditory areas. We show that even though the different fields employ different methods to investigate the activity and connectivity of brain areas, there is consistency in the results on tinnitus between these different approaches. This consistency between human and animals research is observed for tinnitus with peripherally instigated hearing damage, and for results obtained with salicylate and noise-induced tinnitus. The thalamus integrates input from limbic and prefrontal areas and modulates auditory activity via its connections to both subcortical and cortical auditory areas. Reported altered activity and connectivity of the auditory, prefrontal, and limbic regions suggest a more systemic approach is necessary to understand the origins and impact of tinnitus. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

    Original languageEnglish
    Article number108280
    Pages (from-to)1-9
    Number of pages9
    JournalHearing Research
    Volume407
    DOIs
    Publication statusPublished - Aug-2021

    Keywords

    • Auditory processing
    • Thalamus
    • Tinnitus
    • Connectivity
    • Neuroimaging
    • DORSAL COCHLEAR NUCLEUS
    • PRIMARY AUDITORY-CORTEX
    • STATE FUNCTIONAL CONNECTIVITY
    • INFERIOR COLLICULUS
    • RETICULAR NUCLEUS
    • ACOUSTIC TRAUMA
    • NEURAL CHANGES
    • BEHAVIORAL EVIDENCE
    • NETWORK ACTIVITY
    • NOISE EXPOSURE

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