Effect of adaptation and wavelength on the power spectrum of human oscillatory potentials.
Oscillatory potentials were recorded from four adult subjects under dark- and light-adapted conditions with photopically balanced red and blue flashes. The responses between 80 and 200 Hz were analyzed by means of a Fast Fourier transform program. The results show a robust change in the power--but not in the frequency composition--with the different stimulus conditions. We suggest that an analysis of the total power within this frequency band may provide a quantitative way of evaluating the duplex nature of the oscillatory potentials.
Vallabhan
G
G
Department of Ophthalmology and Visual Sciences, Texas Tech Health Sciences Center, Lubbock 79430-0001.
Kristiansen
S
S
Price
J
J
Young
R S
RS
D000222:Adaptation, Physiological; D004596:Electroretinography; D006801:Humans; D008027:Light; D009799:Ocular Physiological Phenomena; D010775:Photic Stimulation / Q000379:methods