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Blue light exposure therapy can aid the healing process of people impact by mild traumatic brain injury. Pixabay

Early morning blue light exposure therapy can aid the healing process of people impact by mild traumatic brain injury, according to new research.

“Daily exposure to blue wavelength light each morning helps to re-entrain the circadian rhythm so that people get better, more regular sleep. This is likely true for everybody, but we recently demonstrated it in people recovering from mild traumatic brain injury, or mTBI,” said study lead author William D Scott Killgore from University of Arizona in the US.


“That improvement in sleep was translated into improvements in cognitive function, reduced daytime sleepiness and actual brain repair,” Killgore added.


Blue light therapy suppresses brain production of a chemical called melatonin. Pixabay

Mild traumatic brain injuries, or concussions, are often the result of falls, fights, car accidents and sports participation.

Headaches, attention problems and mental fogginess are commonly reported after head injuries and can persist for weeks or months for some people.

According to the study published in the journal Neurobiology of Disease, few effective treatments for mTBI exist.

Recent research has shown that the brain repairs itself during sleep, so the resarch team sought to determine if improved sleep led to a faster recovery.

In a randomised clinical trial, adults with mTBI used a cube-like device that shines bright blue light (with a peak wavelength of 469 nm) at participants from their desk or tables for 30 minutes early each morning for six weeks.

Control groups were exposed to bright amber light.

“Blue light suppresses brain production of a chemical called melatonin,” Killgore said.

“You don’t want melatonin in the morning because it makes you drowsy and prepares the brain to sleep. When you are exposed to blue light in the morning, it shifts your brain’s biological clock so that in the evening, your melatonin will kick in earlier and help you to fall asleep and stay asleep,” Killgore added.


Blue Light therapy leads to an improved sleep. Pixabay

People get the most restorative sleep when it aligns with their natural circadian rhythm of melatonin – the body’s sleep-wake cycle associated with night and day.

“If we can get you sleeping regularly, at the same time each day, that’s much better because the body and the brain can more effectively coordinate all these repair processes,” Killgore added.

As a result of the blue light treatment, participants fell asleep and woke an average of one hour earlier than before the trial and were less sleepy during the daytime.

Participants improved their speed and efficiency in brain processing and showed an increase in volume in the pulvinar nucleus, an area of the brain responsible for visual attention.

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Neural connections and communication flow between the pulvinar nucleus and other parts of the brain that drive alertness and cognition were also strengthened, the study said.

“We think we’re facilitating brain healing by promoting better sleep and circadian alignment, and as these systems heal, these brain areas are communicating with each other more effectively. That could be what’s translating into improvements in cognition and less daytime sleepiness,” Killgore said. (IANS)


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Tokyo Olympics 2020 Indian wrestler Ravi Kumar enter semi finals.

Indian wrestler Ravi Kumar (57kg) and Deepak Punia (86kg) enjoyed fruitful outings at the Tokyo Olympic Games as they secured semifinal berths in their respective weight categories at the Makuhari Messe on Wednesday.

On the opening day of the wrestling competition, Ravi Kumar defeated Bulgaria's Georgi Vangelov 14-4 on technical superiority to reach the last-four in the men's 57kg category, while compatriot Deepak Punia overcame China's Zushen Lin 6-3 on points to advance to the semifinals.

Ravi Kumar will take on Nurislam Sanayev of Kazakhstan in the last-four, while Punia will be up against David Morris Taylor of the USA.

Earlier, Ravi Kumar had won his opening-round bout by technical superiority against Colombia's Oscar Tigreros to secure a quarterfinal spot. Competing in the Round-of-16 bout against the Colombian wrestler, the 23-year-old Ravi Kumar, who is making his Olympic debut, showed no nerves as he dominated the bout to win by technical superiority (13-2).

Ravi Kumar landed attack after attack and went 13-2 up, winning the bout by technical superiority with minutes to spare. In wrestling, building up a 10-point lead over the opponent results in a victory by technical superiority.

India's 86kg freestyle wrestler Deepak Punia showed no signs of the niggle that had forced him to pull out of the Poland Open Ranking Series in Warsaw in June, as he defeated Nigeria's Ekerekeme Agiomor on technical superiority to secure a quarterfinal berth.

He got his Olympic campaign to a fine start as he was in control from the start of the bout and hardly ever allowed his Nigerian opponent any room to maneuver his moves, finally winning with a 12-1 on technical superiority.

Punia, who had also suffered an elbow injury just before the Games, was slow at the start but came into his own as the bout progressed, inflicting takedowns at regular intervals to earn points.

The Indian wrestler eased into a 4-1 lead at the break and extended his lead comfortably in the second period.

Punia, the silver medallist from the 2019 world wrestling championships, then set up a clash with China's Lin Zushen in the quarterfinals and defeated him 6-3.

Photo by Rob Pumphrey on Unsplash

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