Metabolic changes induced by theta burst stimulation of the cerebellum in dyskinetic Parkinson's disease patients

Livia Brusa, Roberto Ceravolo, Lorenzo Kiferle, Fabrizia Monteleone, Cesare Iani, Orazio Schillaci, Paolo Stanzione, Giacomo Koch

Research output: Contribution to journalArticle

Abstract

Background: Cerebellar repetitive transcranial magnetic stimulation may be effective in reducing peak-dose levodopa induced dyskinesia in Parkinson's disease patients. It was proposed that the antidyskinetic effect could be due to modulation of cerebello-thalamo-cortical pathways. However the neural basis for these clinical effects have not yet been demonstrated. Methods: We investigated the effects of repeated sessions of cerebellar continuous theta burst stimulation in Parkinson's disease patients with levodopa induced dyskinesia on brain metabolism by means of positron emission tomography scan with fluorodeoxyglucose ( 18F-FDG) to characterize the specific cerebral network activated by cerebellar stimulation in these patients. Results: We found that five days of bilateral cerebellar continuous theta burst stimulation (cTBS) were effective in reducing levodopa induced dyskinesia. Clinical changes were paralleled by a reduction of 18F-FDG metabolism in the cerebellum as revealed by positron emission tomography imaging. We found a global decrease in the metabolism of the bilateral cerebellar hemispheres, and a significant decrease in 18F-FDG uptake in correspondence of bilateral dentate nucleus. Conclusions: Our study demonstrates the antidyskinetic effect of cerebellar cTBS in Parkinson's disease patients with levodopa induced dyskinesia, is paralleled by modulation of the activity of the pathways connecting the cerebellar cortex with the deep cerebellar nuclei, confirming the hypothesis that the motor cerebellar circuit is involved in the generations of levodopa induced dyskinesia.

Original languageEnglish
Pages (from-to)59-62
Number of pages4
JournalParkinsonism and Related Disorders
Volume18
Issue number1
DOIs
Publication statusPublished - Jan 2012

Keywords

  • Cerebellum
  • Dyskinesias
  • Levodopa
  • Parkinson's disease
  • TMS

ASJC Scopus subject areas

  • Geriatrics and Gerontology
  • Clinical Neurology
  • Neurology

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