Accession Number : AD0673890

Title :   A DESCRIPTION AND EVALUATION OF ELECTROENCEPHALOGRAPHIC ANALYSIS TECHNIQUES.

Descriptive Note : Technical rept. Mar-Jul 67,

Corporate Author : AIR FORCE MISSILE DEVELOPMENT CENTER HOLLOMAN AFB N MEX

Personal Author(s) : Todd,Charles E.

Report Date : SEP 1967

Pagination or Media Count : 48

Abstract : The report describes and evaluates the data processing procedures and techniques used to qualify and to quantify physiological impairment associated with prolonged sleep deprivation as evidenced by the electroencephalogram. The primary compression of the data was accomplished by computing the power spectra of selected time intervals using digital filters. Consecutive spectral estimates were then used to describe a surface which was contoured and plotted for display. The evaluation of the processing procedures shows the final spectral estimate error to be thirty to fifty per cent of the ideal spectra as a result of a ten to fifteen per cent error in the quantized data being propagated through the digital filters. The data characteristics were determined by autocorrelation and associated statistical functions and the data reduction system's response to these characteristics was investigated. The properties of the data and the limitations of the techniques discussed suggest the need for improved methods for studying the EEG. (Author)

Descriptors :   (*ELECTROENCEPHALOGRAPHY, *DATA PROCESSING), POWER SPECTRA, MAPPING, SLEEP, INHIBITION, DIGITAL COMPUTERS, PROBABILITY DENSITY FUNCTIONS, CORRELATION TECHNIQUES, INTEGRAL TRANSFORMS

Subject Categories : Medicine and Medical Research
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE