Psychology: what type of electrodes are used to electrically stimulate the brain

Deep brain stimulation (DBS) is a technique developed to treat neurological disorders through direct brain electrostimulation and presently used to treat severe Parkinson's Disease patients that suffer from extreme motor dysfunction (tremors) caused by the condition. The importance when electrically dealing with the brain is size and material used to make the needed electrodes

The short-term effect of tar on the body is increased blood pressure.