http://goo.gl/8Muezh
A new study suggests that light treatment tailored to increase circadian stimulation during the day may improve sleep,depression and agitation in people with Alzheimer's diseaseand related dementia.
Results show that exposure to the tailored light treatment during daytime hours for four weeks significantly increased sleep quality, efficiency and total sleep duration. It also significantly reduced scores for depression and agitation.
The pilot study involved 14 nursing home patients with Alzheimer's disease and related dementia. A light source producing low levels of 300 to 400 lux of a bluish-white light with a color temperature of more than 9000 K was installed in the residents' rooms. Light exposure occurred during daytime hours for a period of four weeks.