Transcranial direct current stimulation (tDCS) based non-invasive neuromodulation (applying mild battery-like electrical stimulation to the scalp), was assessed for safety and efficacy in patients suffering from Early Onset Parkinson’s Disease (EOPD). Ten idiopathic EOPD patients received tDCS at 2.0 mA (mild electrical stimulation of the scalp) for 20 min/day for 10 days within a crossover, double-blind, sham-controlled pilot study. The outcome was evaluated by measuring changes in MDS-UPDRS part III, Non-Motor Symptoms Scale (NMSS), PD-cognitive rating scale, and PD Quality of Life Questionnaire-39 scores.
The study results showed that anodal (battery-like electrical stimulation) but not sham tDCS (placebo stimulation) significantly reduced the Non-Motor Symptoms Scale scores total and "item 2" (sleep/fatigue) scores (patients with early onset Parkinson’s Disease improved with the electrical stimulation). No adverse events occurred (the treatment was safe).
M1 anodal tDCS (battery-like electrical simulation applied to the scalp located specifically over the part of the brain that controls muscle movement) might thus evoke plasticity changes (actually create beneficial chemical and structural changes to brain nerve cells/neurons) in cortical-subcortical (brain-brainstem) circuits involved in non-motor functions, supporting the value as a therapeutic option in EOPD.