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Effect of timed bright light treatment for rest‐activity disruption in institutionalized patients with Alzheimer's disease

Disturbances in rest‐activity rhythm are prominent and disabling symptoms in Alzheimer's disease (AD). Nighttime sleep is severely fragmented and daytime activity is disrupted by multiple napping episodes. In most institutional environments, light levels are very low and may not be sufficient to entrain the circadian clock to the 24‐hour day.