Abstract
A flickering light sensation induced by the extremely low frequency stimulus to retina is known as the one and only phenomenon that the human body can vividly perceive with a biological effect with the use of very weak magnetic fields. Because the flicker sensation can be made visible by direct stimulus to retina, deliberations for details in the retinal receptivity of the sensation are of great importance. In this paper, we examined the several flows of retinal capacities with the extremely low frequency-inducing flicker, employing a functional brain-imaging technique as well as an original human reliability test equipped with spot-detections at irregular intervals. In the results of our functional brain-imaging analyses, the occipital hemodynamics corresponding to the spot-detections were enhanced noticeably when compared with a control experiment. On the other hand, the error rates in the correct spot-detections at the threshold for the flicker perception were significantly poorer in most of eight subjects. The error rates at 80% of the threshold were decreased in no more than five among the subjects; of particular note is, the rates at 70% of the threshold were maintained in two of them. Our experimental results support the fact that extremely low frequency stimuli can reveal definite subliminal effects – – human error, unconsciousness, synaptic plasticity, etc. – – to the human visual perceptions.
Highlights
A flickering light sensation caused by the extremely low frequency (ELF) stimulus to retina is known as the one and only phenomenon that the human body can articulately perceive with a biological effect with the use of very weak magnetic fields
Considerations for details in the retinal receptivity of the ELF-inducing flicker sensation are of great importance, because the sensation can be made visible by direct stimulus to retina
In this paper, leveraging on the verification of human reliabilities during ELF stimuli, we investigated the several flows of retinal activities with the ELF-Inducing flicker sensation, employing functional near-infrared spectroscopy (fNIRS) analyses as well as an original human reliability test equipped with spot-detections at irregular intervals
Summary
Regardless of the essential low energies of extremely low frequency (ELF) magnetic fields, not a few reports have shown that the fields can affect retinal nervous activities on the neural network of the retina. Among other things, a flickering light sensation caused by the ELF stimulus to retina is known as the one and only phenomenon that the human body can articulately perceive with a biological effect with the use of very weak magnetic fields. Considerations for details in the retinal receptivity of the ELF-inducing flicker sensation are of great importance, because the sensation can be made visible by direct stimulus to retina. In magnetic stimulus experiments, fNIRS has the great advantage over fMRI, MEG and PET, because of no-interference with electromagnetic fields, a real time function with a moderate amount of physical restraint, and so on. Based on this principle, accompanied with the advantage of fNIRS measurements, the researcher can find the close connection between human reliabilities and retinal activities for preventive solutions for serious human errors/artificial mistakes in the context of retinal neural network. In this paper, leveraging on the verification of human reliabilities during ELF stimuli, we investigated the several flows of retinal activities with the ELF-Inducing flicker sensation, employing fNIRS analyses as well as an original human reliability test equipped with spot-detections at irregular intervals
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