High-Definition Transcranial Direct Current Stimulation Device for Targeting Cerebral Cortex

Non-invasive brain stimulation (NIBS) devices are progressively used as neuromodulator and are showing optimistic potential in the field of point care medical technology. The main aim of this study is to develop a prototype device, which helps in improving various neurological disorders, by increasing or decreasing neuronal excitability, depending upon the selection of a weak intensity of direct current. Conventionally, high definition transcranial direct current stimulation (HD-tDCS) device mainly depends upon three factors, viz, small size of high definition electrodes, multi-electrode configurations and optimized distribution of weak direct currents to the active and return electrodes. The proposed prototype HD-tDCS device is mainly focused on the internal circuit of the device, which provides precise distribution of direct current to both active and return electrodes, considering selected configurations. In this paper, HD-tDCS device has been designed which provides a weak direct current in the range of 1.00mA to 4.00mA with a measured error of +0.06mA to 0.06mA in the output direct currents. The % error between the theoretical and the measured values is less than 2%.