Quite simple at first glance - complex at a second: Modulating neuronal activity by tDCS

摘要

Transcranial direct current stimulation (tDCS) is a simple and comfortable way to influence brain activity compared to other methods such as transcranial magnetic stimulation (TMS). It is also easily portable and cheap, and has therefore become a popular method of non-invasive brain stimulation that can be used for example, during walking, or at home. In contrast to TMS, tDCS does not elicit action potentials in neurones; instead it is thought to increase or decrease neuronal excitability and spontaneous activity in the same way as some neuromodulatory transmitters such as nor adrenaline. tDCS is usually given via two electrodes placed on the scalp, one above a target brain region, which is often assumed to be a cortical area, and the other at a remote site such as the opposite side of the head.