Mathematical analysis of electroencephalographic data provides valuable information about the functional state of the brain, enables improved understanding of complex physiological phenomena, and offers the possibility of facilitating the diagnosis of brain disease. This book is a translation by Dr. John S. Barlow of the proceedings of a symposium, held during the Tenth Congress of the All-Union Physiological Society in the USSR in 1964, on the analysis of experimental and clinical electroencephalographic data by means of mathematical and electronic computing techniques.