Transcranial Alternating Current (tACS) is a form of non-invasive brain stimulation that delivers a weak electrical current that alternates at a specified frequency back and forth between electrodes. Administration of tACS will be provided using a custom-built tACS-EEG device called the Rio Transceiver, manufactured by eemagine Medical Imaging Solutions GmbH. The device consists of a battery-driven unit that allows for the combined recording of electroencephalography (EEG) signals and administra