Period Analysis of the Clinical Electroencephalogram
Period analysis as an analytical technique for data reduction of the electroencephalogram (EEG) was introduced in 1955 and has been under continuing development since that time. Most applications of period analysis have utilized only one or at most two channels of EEG and the majority of experimental situations have probably been state of consciousness studies often in unusual enviroments such as the orbital flight of Gemini-7. Only recently has the system been developed for 8 channels of simultaneous analysis, data logging and general purpose digital manipulation. The evolution of such an 8 channel system finally allows the application of period analytic techniques to the problems of clinical electroencephalography.