Non-invasive Repetitive Paraorbital Alternating Current Stimulation Therapy for Aphasia

Repetitive, transorbital alternating current stimulation (rtACS) is applied with multi-channel device generating weak current pulses in predetermined firing bursts of 2 to 9 pulses. The amplitude of each current pulse is below 1000 microA. Current intensity is individually adjusted according to how well patients perceived phosphenes, i.e. any sensation of flickering light in response to the rtACS stimulation

A clicking sound is presented and the same electrode montage set-up is used during rtASC- and Placebo-stimulation, except that placebo patients received no current (stimulator turned off).