Effect of Transcranial Direct Current Stimulation on the Voice

The goal of this clinical trial is to verify the effect on the voice of transcranial direct current stimulation (tDCS) in vocally healthy non-singers. The main question it aims to answer is: What is the brain area in which tDCS promotes better vocal performance in vocally healthy individuals? Each participants received anodal tDCS applied at an intensity of 2 mA for a duration of 20 minutes for tDCS stimulations in different areas with a 7-day washout period between stimulations. Vocal assessments was conducted before and after the intervention. The targeted places were the primary motor cortex (M1), primary somatosensory cortex (S1), Cerebellum, and dorsolateral prefrontal cortex (DLPFC).