Night Photostimulation of Clearance of Beta-Amyloid from Mouse Brain: New Strategies in Preventing Alzheimer's Disease

What the authors concluded

Our results on healthy mice show that Aβ clearance from the brain occurs faster at night than during wakefulness. The PS [=photostimulation] course at night improves memory and reduces Aβ accumulation in the brain of AD mice more effectively than the PS course during the day. Our results suggest that night PS is a more promising candidate as an effective method in preventing AD than daytime PS.