Being exposed to short periods of blue light can help to boost subsequent activation in those brain areas that are significant to successful working memory performance thus, resulting in enhanced reaction time, according to a recent study.
Anna Alkozei, the lead author of the study, said that previous studies have shown that exposure to blue light (like LED light) is almost similar to basking under sunlight, which leads to improved alertness and enhanced performance on response time tasks. Alkozei is a well-recognized postdoctoral researcher in the Department of Psychiatry, University of Arizona in Tucson.
The recent study revealed that being exposed to blue light for about 30 minutes can help to enhance cognitive task performance in comparison to amber light exposure for the same duration.
Exposure to blue light can enhance brain health, says study
The study which was published at SLEEP 2016: 30th Anniversary Meeting of the Associated Professional Sleep Societies, scanned over 35 healthy adults out of which 18 were females. The participants were then exposed to blue light for 30 minutes with no particular order with the help of Philips goLITE BLU Energy Light device. This was followed by a working memory assignment during functional MRI. The participants of the study were then tested in the morning after a regular night of sleep.
After the assessment, it was found that those who were exposed to blue light showed better activation within the ventrolateral and prefrontal cortex during end of the task as against those who were exposed to amber light. The ventrolateral and prefrontal cortexes are important brain regions that are accountable for triumphant cognitive performance.
Also, those who were exposed to blue light experienced a faster reaction time of (p=.04), where they were capable of reacting to questions in a more precise manner per second (P = .01).