Accession Number : AD0751778

Title :   Frequency Analysis of Visual Evoked Potentials from Anesthetized 'Macaca nemestrina' using Power Spectra Estimates.

Descriptive Note : Progress rept.,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Lewis,Georgy W.

Report Date : 18 AUG 1972

Pagination or Media Count : 24

Abstract : The effects of varying intensity and retinal loci on the monkey visual evoked potential (VEP) were determined by frequency analysis. Frequency information in the VEP was investigated by use of the Fast Fourier Transform (FFT), the FFT output being represented by power spectra estimates. The spectra estimates were subjected to discriminant analysis. Information higher than the alpha range (8-12 Hz) was found. An alpha component (11.23 Hz) was the best discriminating frequency when intensity was varied. The 23.44 Hz component was the best discriminating frequency for retinal loci variation. Overall, discriminating frequencies were higher for retinal loci than for intensity. (Author)

Descriptors :   (*VISION, *PSYCHOPHYSIOLOGY), STIMULATION(PHYSIOLOGY), RESPONSE(BIOLOGY), PERCEPTION, LIGHT, INTENSITY, ELECTROENCEPHALOGRAPHY

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE