Light Exposure May Be the Cure for Afternoon Drowsiness
September 12, 2006
It is known that ambient light can influence aspects of human physiology including brain function, circadian rhythm, heart rate, and hormone release. But most studies of this have focused on the effects of light during the night -- few have examined the body's response to light during the day.
Bright Light in the Morning
A new study exposed participants to 21 minutes of bright white light in the morning. They became more alert, and brain images showed that regions of the brain involved with alertness and some cognitive processes became more active.
Attention, Alertness, Performance
Those brain regions are also involved with attention and arousal regulation. This means that light exposure could affect performance and alertness at work.