<qa>  What is the brains electrical activity?This study will use electroencephalography EEG and electromyography EMG to examine how the brain generates tics and controls voluntary movement in patients with Tourettes syndrome and chronic motor tic disorder. EEG records the electrical activity of the brain. For this test, a cap with built-in electrodes is placed on the subjects head, and the electrodes are connected to a monitor that records the brain activity. EMG records muscle activity using electrodes placed on the skin over muscles on the fingers or above the outer corner of the eyes. 