“…It should be added, however, that other authorities, e.g. Scott & Prior (1970) and Adams & Jennet (1967) are less convinced about the specificity of these periodic changes. One can conclude, however, that the electroencephalographic picture in general is very variable, yet in certain particular cases, clearly delineated abnormalities may be seen and thus give support to the clinical diagnosis and perhaps afford an additional reason for carrying out brain biopsy.…”