Assessment of the capability to target cerebellar sub-regions with high-definition transcranial direct current stimulation High-Definition transcranial Direct Current Stimulation High-Definition transcranial Direct current stimulation (HD-tDCS) over the cerebellum

The increasing interest in the application of tDCS over different cerebral regions has induced increasing efforts into the optimization of specific electrodes montages to selectively target the desired volumes. In order to increase the stimulation focusing, High-Definition (HD) tDCS electrodes have been proposed and their efficacy was firstly assessed by computational methods. In this paper, we optimized the deployment of HD-TDCS bipolar electrodes montages designed to target three different neural clusters in the cerebellum. The assessment of the electric field generated by and the focusing capability of the montages was evaluated through computational techniques on an anatomical high-definition head model. Results show the possibility to reach even deep target in the cerebellum with an electric field able to induce neuromodulation, while in parallel limiting its field distribution spread.