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Related Experiment Videos

[GABA-B-associated neuropsychiatric disorders].

Peter Eichhammer1, Berthold Langguth, Marc Zowe

  • 1Klinik für Psychiatrie und Psychotherapie der Universität Regensburg. peter.eichhammer@medbo.de

Psychiatrische Praxis
|December 1, 2004
PubMed
Summary

Transcranial magnetic stimulation (TMS) reveals dysfunctional GABA-B inhibition in schizophrenia and chronic tinnitus. This finding highlights altered cortical inhibitory processes in these conditions.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Audiology

Context:

  • Schizophrenia and chronic tinnitus are associated with disturbed GABA-B mediated cortical inhibition.
  • Transcranial magnetic stimulation (TMS) is an in vivo method to investigate cortical inhibition.

Purpose:

  • To investigate GABA-B associated cortical inhibition in drug-naive first-episode schizophrenic patients and chronic tinnitus patients using TMS.
  • To detect disease-related cortical inhibitory processes in these patient groups.

Summary:

  • TMS measurements of the cortical silent period indicated dysfunctional GABA-B mediated cortical inhibition in both schizophrenic and chronic tinnitus patients.
  • These findings suggest impaired inhibitory processes within thalamocortical circuits.

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Impact:

  • TMS provides novel insights into the pathophysiology of neuropsychiatric disorders.
  • Data align with models of disturbed thalamic gating in phantom perceptions, including auditory hallucinations, chronic tinnitus, and central pain.