![]() Nearly all living things have a body clock that synchronises to the 24-hour pattern of the Earth’s rotation. ‘Our most surprising finding was that individuals using the e-reader would be more tired and take longer to become alert the next morning,’ she said. Neuroscientist Dr Anne-Marie Chang, whose research was published in the journal Proceedings of the National Academy of Sciences, said screens have an ‘extremely powerful effect’ on the body’s natural sleep pattern. The researchers found they have less rapid eye movement, a stage of sleep thought to be crucial because it is when people consolidate memories. ![]() ‘It has the potential to positively influence a range of settings where cognitive function and alertness are important.’ ‘Blue light and caffeine demonstrated distinct effects on aspects of psychomotor function,’ said the authors of the report. The same distraction, however, proved too much for caffeine users, who performed poorly. Interestingly, people exposed to blue light performed better on tests of brain function that included a distraction. ![]() Researchers at Mid Sweden University compared the effects of caffeine and blue light on the brain and found them both to have a positive effect. Smartphones and other gadgets used before bed can cause restless nights because their light causes melatonin suppression – a chemical which controls the body clock.īut there are some positives, according to a recent study, that looks at how blue light can make the brain more alert if it is used at the right time. Smartphones used before bed can cause restless nights because their light causes melatonin suppression which disrupts the body clockīlue light has been getting a bad reputation lately for its role in disrupting sleep.
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