Abstract: A computer-controlled, servo-mechanism associated with a system for treating a subject having a neuro-cerebral disorder characterized by internal lesions, the system including an applicator that projects a corona discharge beam toward an external site on the subject adjacent the lesions. The servo-mechanism is adapted to position the applicator to cause the beam projected therefrom to trace a pattern of movement on the site in accordance with a program entered into the computer controlling the mechanism, whereby all areas on the lesions are subjected by the beam to ion bombardment that acts to alleviate the disorder. To maintain the site steady during treatment, the subject is seated in and confined to a jig chair behind whose back rest is installed the servo-mechanism.