1) A head fixing apparatus radiography was made. Encephalograph could be taken in correct position to measure exactly the position of the pallidum. 2) A characteristic stereoenchephalotomic apparatus was made and the results were found satisfactory in using. 3) 10% Moljodol oil-wax injected to clarify the position and the form of the lesion after operation. 4) After operation radiorgaphy was performed to make the form and the position of the lesion clear. They were compared with the operation effects.