Stabilization of alpha frequency by sinusoidally modulated light.

Two experiments demonstrate that a spontaneous electroencephalographic (EEG) rhythm, alpha, can be frequency-stabilized by sinusoidally modulated light (SML) but not by photic flash stimulation. It is suggested that this frequency stabilizing effect is not due to superimposition of an evoked response on the background EEG. Instead, SML might phase-lock the scalp-recorded alpha rhythm by influencing subcortical alpha generators within narrow limits set by the inherent resonant EEG frequency.

[1]  H. D. L. Dzn.  Research into the dynamic nature of the human fovea-cortex systems with intermittent and modulated light. I. Attenuation characteristics with white and colored light. , 1958 .

[2]  W. Walter,et al.  Analysis of the Electrical Response of the Human Cortex to Photic Stimulation , 1946, Nature.

[3]  W. Walter,et al.  The central effects of rhythmic sensory stimulation. , 1949, Electroencephalography and clinical neurophysiology.

[4]  L. H. Van Der Tweel,et al.  HUMAN VISUAL RESPONSES TO SINUSOIDALLY MODULATED LIGHT. , 1965, Electroencephalography and clinical neurophysiology.

[5]  H. Gastaut,et al.  An experimental study of the mechanism of photic activation in idiopathic epilepsy. , 1950, Electroencephalography and clinical neurophysiology.

[6]  F. H. Lopes da Silva,et al.  Dynamic characteristics of visual evoked potentials in the dog. I. Cortical and subcortical potentials evoked by sine wave modulated light. , 1970, Electroencephalography and clinical neurophysiology.

[7]  A. Rémond,et al.  The alpha average. II. Quantitative study and the proposition of a theoretical model. , 1969, Electroencephalography and clinical neurophysiology.

[8]  K. Kitajima,et al.  A simplified method for autocorrelation analysis in electroencephalography. , 1962, Electroencephalography and clinical neurophysiology.

[9]  R. E. Townsend.  A device for generation and presentation of modulated light stimuli. , 1973, Electroencephalography and clinical neurophysiology.

[10]  L Maffei,et al.  Retinal ganglion cell response to sinusoidal light stimulation. , 1966, Journal of neurophysiology.

[11]  H. Lange.  Attenuation characteristics and phase shift characteristics of the human fovea-cortex systems in relation to flicker-fusion phenomena , 1957 .

[12]  A. Rémond,et al.  The alpha average. I. Methodology and description. , 1969, Electroencephalography and clinical neurophysiology.

[13]  J. Eccles,et al.  Inhibitory Phasing of Neuronal Discharge , 1962, Nature.