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POPSMost older adults have brain disease: study Older persons can often handle one pathology in their brain, but the burden of more than one pathology may tip them over the threshold of clinical dementia Therefore, prevention of not only Alzheimer's disease but these other pathologies, particularly stroke and those things that may increase the risk of stroke, like high blood pressure, high cholesterol, cigarette smoking, obesity, "are likely to significantly decrease the prevalence of dementia
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POPSOmega-3 in fish oils might ease depression Only just found this. Reported 2 weeks a go in USA Today. Links now with Omega-3 helping with depression and Alzheimer's. Seems to be a lot of evidence mounting now suggesting EPA and DHA - fish oil - one of the best things you can take for your mental health.
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POPSBad Habits Increase Risk of Alzheimers I hope it goes without saying that a risk increase is not to be confused with causes which are many and still largely unknown. These are longitudinal studies rather than laboratory research.
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POPSFootball Players' Wives United by Husbands' Dementia 
A sad picture, isn't it? :-( Ralph Wenzel's wife said that "his neurologist had determined that on-field brain trauma was the probable cause of his Alzheimer’s-type dementia. In more lucid times Mr. Wenzel estimated his number of concussions as “more than I can count.” "Sylvia Mackey said that the cause of her husband’s frontal temporal dementia was less clear, but that his football collisions — including one headfirst impact with a goal post at full speed — were the likely culprit." "Mr. Wenzel’s dementia is far more apparent than Mr. Mackey’s. Mr. Wenzel walks gingerly, rarely mumbles more than a few nonsensical syllables before growing tired or tongue-tied, and cannot feed himself. He can offer no memories of his N.F.L. career, whether they are about the position he played (offensive line), his seasons (1966-73), his teams (the Pittsburgh Steelers and San Diego Chargers) or his teammates." Are brain-endangering sports worth the risk of early onset Alzheimers' in players?
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POPSDNA & The Brain - by James Watson (dd 2006) 1h15m lecture by James D Watson himself, one of the four discoverers of the structure of the DNA molecule. (fast forward the first 6 minutes) Co-author of the article A Structure for Deoxyribose Nucleic Acid - by Watson & Crick. (dd 1953)
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POPSLonliness Impacts Brain Function (continuing on) About one if five Americans experience loneliness, Cacioppo said. And it is a growing problem in modern society in part because the average household size is decreasing. By 2010, 31 million Americans — roughly 10 percent of the population — will live alone, Cacioppo and his colleagues say. Previous work has suggested it can be as detrimental to health as smoking, Cacioppo said. In his book, "Loneliness: Human Nature and the Need for Social Connection" (W.W. Norton, 2008), he presented evidence that loneliness is related to less blood flow through the body, poorer immune systems, increased levels of depression and a faster progression of Alzheimer's disease.
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POPSNorman Wisdom: alzheimers I watched the very moving documentary about the lovely comedian's slow descent into alzheimers and how his family dealt with it. Much light in it too, yet my prayers for those for are affected.
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POPSResearchers find possible environmental causees for Alzheimer's, diabetes, Parkinson's More: Nitrites and nitrates belong to a class of chemical compounds that have been found to be harmful to humans and animals. More than 90 percent of these compounds that have been tested have been determined to be carcinogenic in various organs. They are found in many food products, including fried bacon, cured meats and cheese products as well as beer and water. Exposure also occurs through manufacturing and processing of rubber and latex products, as well as fertilizers, pesticides and cosmetics.