1. Transcranial Direct Current Stimulation (tDCS ) Direct current stimulation (DCs) is a simple, non- invasive technique for brain stimulation that induces prolonged functional changes in the cerebral cortex. DCs consists of delivering for minutes a weak direct current over the scalp.

2. tDCS Clinical Applications  Stroke Movement Disorders Cognition Neuropsychiatric Disease Pain New Applications for tDCS  Cerebellar stimulation Spinal cord stimulation

3. Electrode montage CEPHALIC REFERENCE Both the electrodes over tha scalp Frequently used Two different cerebral area are stimulated with different polarity  confounding factor No adverse effect reported EXTRACEPHALIC REFERENCE The active electrode over the scalp, the reference electrode over the right arm Less used Only tha area under the active electrode is stimulated No adverse effect reported