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DOI: 10.1055/s-2004-828432
Behandlung von chronischem Tinnitus mit niedrigfrequenter repetitiver transkranieller Magnetstimulation (rTMS) - gibt es Langzeiteffekte?
Low Frequency Repetitive Transcranial Magnetic Stimulation (rTMS) for the Treatment of Chronic Tinnitus - Are there Long-Term Effects?Publication History
Publication Date:
29 November 2004 (online)
Zusammenfassung
Anliegen: Klinische, neurophysiologische und funktionell bildgebende Daten belegen, dass Tinnitus mit umschriebener kortikaler Überaktivität assoziiert ist. Niedrigfrequente rTMS ist eine neuartige nicht-invasive Methode zur Reduktion kortikaler Aktivität. Methode: Patienten mit chronischem Tinnitus wurden im Rahmen einer plazebokontrollierten Pilotstudie mit niedrigfrequenter rTMS behandelt (110 % Motorschwelle; 1 Hz; 2000 Stimuli/Tag über fünf Tage). Mithilfe eines Neuronavigationssystems konnte auf der Basis struktureller und funktioneller Bilddaten das hyperaktive Areal im primärakustischen Kortex individuell gezielt stimuliert werden. Ergebnisse: Nach Behandlung mit aktiver TMS kam es zu einer Verminderung der Tinnituswahrnehmung, Behandlungeffekte hielten bei einem Teil der Patienten über mehrere Monate an. Schlussfolgerungen: Neuronavigierte rTMS eröffnet neue Möglichkeiten im Verständnis und in der Behandlung von chronischem Tinnitus.
Abstract
Objective: Clinical, neurophysiological and neuroimaging data suggest that chronic tinnitus resembles neuropsychiatric syndromes characterised by focal brain activation. Low frequency repetitive transcranial magnetic stimulation (rTMS) has been proposed as an efficient method in treating brain hyperexcitability disorders. Methods: Patients suffering from chronic tinnitus underwent a [18F]deoxyglucose-PET (positron emission tomography). Fusioning of the individual PET scan with the structural MRI-scan (magnetic resonance imaging, T1, MPRAGE) revealed an increased metabolic activation in the primary auditory cortex as target point for rTMS. A neuronavigational system enabled the positioning of the figure of eight coil in relation to the target area. rTMS (110 % motor threshold; 1 Hz; 2000 stimuli/day over 5 days) was performed using a placebo controlled cross-over design. Results: Following active rTMS there was a moderate improvement of tinnitus perception. Treatment effects lasted up to six months in some patients. Conclusions: Neuronavigated rTMS offers new possibilities in the understanding and treatment of chronic tinnitus.
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Dr. med. Berthold Langguth
Klinik für Psychiatrie und Psychotherapie der Universität am Bezirksklinikum Regensburg
Universitätsstraße 84
93053 Regensburg
Email: berthold.langguth@medbo.de