“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. That improvement in sleep was translated into improvements in cognitive function, reduced daytime sleepiness, and actual brain repair,” says William D. “Scott” Killgore, psychiatry professor in the College of Medicine-Tucson and lead author of a new study in Neurobiology of Disease.
“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 says.