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Treatment with light benefits Alzheimer's patients, Wayne State University finds
Date:1/11/2012

the placebo group also were reported as showing improvements, with caregivers saying their patients were calmer and had reduced resistance to care.

The level of effects varied, Etcher said, noting that while the blue-green group recipients were largely reported by caregivers as showing improvement, a few showed little to no effect from the treatments.

"Some of the rest-activity pattern disruptions that we see associated with Alzheimer's dementia may not necessarily be circadian based," Etcher said. "They may be due to unmet needs, pain or other phenomena, and therefore would not respond to an intervention aimed at regulation of the circadian system."

Calling her study preliminary, she said it now needs to be replicated with a larger sample and different demographics.

In addition to ascertaining which behaviors are circadian based, establishing which methods are most appropriate to analyze data like Etcher's requires exploration, she said. She is proposing further work that uses two different nonlinear analytic methods to examine sensitivity and specificity to detect change in circadian patterns, with a long-term goal of developing interventions to regulate those patterns to the benefit of patients' overall function.

"If they sleep better at night, and are more awake during the day, they can eat, they can interact with other people and they can take advantage of other cueing agents in the environment," she said. "In addition to light during daytime and darkness during the nighttime, smells at mealtimes, food intake, interactions all these things in conjunction help regulate our day."


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Contact: Julie O'Connor
julie.oconnor@wayne.edu
313-577-8845
Wayne State University - Office of the Vice President for Research
Source:Eurekalert

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