周期的点滅光刺激に対する脳波と末梢血流の応答

概要

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In the brain there are many oscillators producing rhythmic activity in several frequency ranges. These oscillators are usually active in a randomized way, but by application of sensory stimulation these oscillators are coupled and act together in a coherent manner. These synchronization and enhancement of activity gives rise to an evoked rhythm in EEG signal. Responses of the oscillators in brain and the cardiovascular systems to periodic light stimulation are studied by means of spectral analysis on the evoked EEG signal and the digital blood content fluctuations. Remarkable entrainment phenomena in the evoked EEG and strong influence on the thermoregulation rhythm in peripheral vasomotor tone are observed. The existence of nonlinear oscillator producing α rhythm is strongly suggested by the entrainment phenomena. It is also suggested that both the sympathetic nervous system and renin-angiotensin system mediate peripheral blood flow fluctuations at the frequency of 0.05Hz.
東海大学の論文