• Neuromodulation · Jun 2018

    Modulation of Cerebellar-Cortical Connections in Multiple System Atrophy Type C by Cerebellar Repetitive Transcranial Magnetic Stimulation.

    • F Gokcem Yildiz, Esen Saka, Bulent Elibol, and Cagri Mesut Temucin.
    • Institute of Neurological Sciences and Psychiatry, Hacettepe University, Ankara, Turkey.
    • Neuromodulation. 2018 Jun 1; 21 (4): 402-408.

    ObjectiveThis study aims at modulating the altered cerebellar-cortical interactions in patients with multiple system atrophy-cerebellar subtype (MSA-C) by using cerebellar repetitive transcranial magnetic stimulation (rTMS). We hypothesized that cerebellar modulation by low-frequency rTMS can resolve the abnormal cortical excitability in multiple system atrophy cerebellar subtype.Materials And MethodsWe studied detailed effects of rTMS of the cerebellum on reaction time (RT) and short-latency afferent inhibition (SAI) response in MSA-C group, Alzheimer Disease (AD) group, and a control group of healthy individuals. The RT and SAI responses were measured before and after 1 Hz cerebellar rTMS in all groups. The study was conducted in the neurophysiology laboratory in Hacettepe University Hospital.ResultsOur results indicated that motor cortex disinhibition was predominant in patients with AD and MSA-C. In AD and control groups, there were no changes in SAI after rTMS. However, after application of rTMS over the cerebellum in MSA-C patients, the pathological disinhibition and RT results showed an improvement compared to their previous results.ConclusionOur study highlights that cerebellar rTMS impairs abnormal cerebellar-cortical inhibitory connections in case of MSA-C.© 2017 International Neuromodulation Society.

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