Neurodegenerative cerebellar ataxias represent a group of disabling disorders which currently lack effective therapies. Cerebellar transcranial direct current stimulation (tDCS) is a non-invasive technique, which has been demonstrated to modulate cerebellar excitability and improve symptoms in patients with cerebellar ataxias. In this randomized, double-blind, sham-controlled study followed by an open-label phase, the investigators will evaluate whether a repetition of two-weeks' treatment with cerebellar anodal tDCS and spinal cathodal tDCS, after a three months interval, may further outlast clinical improvement in patients with neurodegenerative cerebellar ataxia and can modulate cerebello-motor connectivity, at short and long term.
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Change in the International Cooperative Ataxia Rating Scale (ICARS) Score From Baseline
Timeframe: Baseline - 2 weeks
Change in the Scale for the Assessment and Rating of Ataxia (SARA) Score From Baseline
Timeframe: Baseline - 2 weeks
Change in the Cerebellar cognitive affective syndrome (CCAS) Scale From Baseline
Timeframe: Baseline - 2 weeks