Dec 10, 2015

Negative Thoughts and Beliefs About Aging Can Cause Alzheimer's

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Negative Thoughts and Beliefs About Aging Predict Alzheimer's

You get to decide how you feel and view the world. What you feed your brain - in other words, what you think about, the kinds of thoughts you have (positive, negative), and your attitude determine how you feel.

Alzheimer's research indicates that those who think negatively about aging are more like to suffer from Alzheimer's Disease.

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Negative beliefs about aging predict Alzheimer's disease

Newly published research led by the Yale School of Public Health demonstrates that individuals who hold negative beliefs about aging are more likely to have brain changes associated with Alzheimer's disease, memory loss, and signs of dementia.
  • The study suggests that combating negative beliefs about aging, such as elderly people are decrepit, could potentially offer a way to reduce Alzheimer's symptoms.
The study led by Becca Levy, associate professor of public health and of psychology, is the first to link the brain changes related to Alzheimer's disease to a cultural-based psychosocial risk factor.
"We believe it is the stress generated by the negative beliefs about aging that individuals sometimes internalize from society that can result in pathological brain changes," said Levy. "Although the findings are concerning, it is encouraging to realize that these negative beliefs about aging can be mitigated and positive beliefs about aging can be reinforced, so that the adverse impact is not inevitable."
  • Study authors examined healthy, dementia-free subjects from the Baltimore Longitudinal Study of Aging, the nation's longest-running scientific study of aging. 
  • Based on MRIs, the researchers found that participants who held more negative beliefs about aging showed a greater decline in the volume of the hippocampus, a part of the brain crucial to memory. 
  • Reduced hippocampus volume is an indicator of Alzheimer's disease.
Then researchers used brain autopsies to examine two other indicators of Alzheimer's:
  • amyloid plaques, which are protein clusters that build up between brain cells; and neurofibrillary tangles, which are twisted strands of protein that build up within brain cells.
  • Participants holding more negative beliefs about aging had a significantly greater number of plaques and tangles. The age stereotypes were measured an average of 28 years before the plaques and tangles.
In both stages of the study, Levy and her colleagues adjusted for other known risk factors for Alzheimer's disease, including health and age.

The findings were published online in the journal Psychology and Aging.

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Other authors include biostatistician Martin Slade of the Yale School of Medicine, neurologist Juan Troncoso of the Johns Hopkins School of Medicine, and a team of researchers from the Intramural Research Program of the National Institute on Aging (NIA), which included its scientific director Luigi Ferrucci, cognitive psychologist Alan Zonderman, and neuroscientist Susan Resnick. The study was made possible by grants from the NIA.