Could you tell me what should I expect after one hour the bright light stimulation
( > 500 lux or < 500 lux) via goggles, before performing the task, for example d2 test of attention? I would like to know something about impact on alpha and delta band.
Additionally, is it possible that bright light stimulation will have got influence on P300 response?
Everything depends on the type of light. It has been shown that it is particularly light of blue spectrum (460-480nm) that can have a procognitive effect. There are many variables that have to be considered, light intensity is only one of them.
Most of the studies provide evidence that there is an increase in alpha activity during and even after blue light stimulation + you may be interested in articles using P300.
http://www.ncbi.nlm.nih.gov/pubmed/19823003
http://www.ncbi.nlm.nih.gov/pubmed/25447474
After a quick google search, I found research that shows that light therapy can help to improve focus in people with ADD:
J Clin Psychiatry. 2006 Oct;67(10):1527-35.
An open trial of light therapy in adult attention-deficit/hyperactivity disorder.
Rybak YE1, McNeely HE, Mackenzie BE, Jain UR, Levitan RD.
BUT, can lead to jitteriness in others:
http://www.cet.org/wp-content/uploads/2014/06/Terman-1999-JCP-copy.pdf
I look forward to hearing from others who may have done research and experiments in this area!
I think that your results will be confounded by circadean rhythms. It will depend on the Time Of Day and the bodies TOD rhythm whether it will increase or decrease attention. The net effect of bright light stimulation will be the advance of the bodies TOD rhythm up to 2 hours If there is already an offset this could act to either increase the attention strength or reduce it.
For instance in the case of someone who is Night / day inverted this might have exactly the opposite effect that it will to someone who is just a few hours late.
If you don't have an hypothesis about what will happen, why you want to do this experiment?
In any case, I suppose that the light stimulation of one hour previous to the realization of the task will decrease the P300 response. I'll explain myself; the light (>500 lux) could be a distractor that decreases the subjects attention because the fatigue caused for its exposure. After one hour the subject will be exhausted and will not pay (or less) attention to the P300 test. The results of it, will vary in a subject dependent way, for some subjects maybe the exposure will cause no effect, but for others (and I think that the majority will) the attention will decrease, causing a decrease on the P300 response and/or a latter latency.
Everything depends on the type of light. It has been shown that it is particularly light of blue spectrum (460-480nm) that can have a procognitive effect. There are many variables that have to be considered, light intensity is only one of them.
Most of the studies provide evidence that there is an increase in alpha activity during and even after blue light stimulation + you may be interested in articles using P300.
http://www.ncbi.nlm.nih.gov/pubmed/19823003
http://www.ncbi.nlm.nih.gov/pubmed/25447474
I agree. You will need to be more specific about the wavelength of light that you are using for stimulation. Blue spectrum may stimulate the brain and red light may have the opposite affect. There is new information about this coming about because of the effect of computer and phone usage just before sleep. You may want to check out biophotonics journals and references.
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