Transcranial Direct Current Stimulation: Mechanisms and Psychiatric Applications.

Transcranial direct current stimulation (tDCS) involves the application of weak electric current to the scalp. tDCS may influence brain functioning through effects on cortical excitability, neural plasticity, and learning. Evidence in adults suggests promising therapeutic applications for depression, and the adverse effect profile is generally mild. Early research indicates complex interactions between tDCS and concurrent cognitive and motor tasks. Further investigation is warranted to understand how tDCS impacts processes relevant to psychiatric conditions.