This new treatment for Parkinson's Disease is called Deep Brain Stimulation (DBS). It begins with the surgical implantation of electrodes that send signals to specific parts of the brain. The eletrodes are regulated by a pacemaker-like device in the chest. When activated, the electrodes counteract the tremors.
In the above video by the New York Post, Dr. Paul J. Waguespack activates the system in a patient named Mr. Richardson. Once the system is turned on, Mr. Richardson's tremors stop cold within seconds.
-via Robb Allen