Light has been regarded the major stimulation for the brain since Adrian and Metthew [1]. The discovery of the suprachiasmatic nucleus (SCN), which regulates the master biological clock [2], has confirmed this notion. The discovery of the photopigment melanopsin in retinal ganglion cells in 1998 provided new insight into the role of light in brain pathology [3]. The effect of flashing at 10 Hz with LED light of various wavelengths on the alpha system's reaction was investigated. We've shown that when the RED-LED light flashes, this response, which is consistent with frequency drive and alpha rhythm voltage augmentation, is considerably more substantial than when the GREEN-LED, BLUE-LED, or WHITE-LED (three-chrome) light flashes. The amplitude increase and phase reset of the alpha waves produced by RED-LED flashing at 10 Hz could be due to photobiomodulation on cytochrome c oxidase [4,5] and/or photopigment melanopsin, at the level of the retinal ganglion cells, that reinforce the incoming cone-LHC signal and thus the projection to the SCN [6], or to reinforcement of postsynaptic short term responsiveness, in retinal cone-LHC The increase in amplitude and phase reset of alpha rhythms caused by flashing at 10 Hz is thought to be largely controlled in the retina. The inclusion of alpha rhythms could lead to a better understanding of how phase synchronisation supports the flexibility of memory system interaction and could provide fresh insight into phase synchronization's function in general.
Author(S) Details
Francesco Ferro Milone
L. D. University, Verona and Prosenectute, Vicenza, Italy.
Antonio Tullio Minelli
CRIRMANMEC University, Padova, Italy.
Roberto Cian
Ocular Department Hospital, Vicenza, Italy.
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