Medical notes this week…
Doctors have known that periodontal disease is connected to heart disease…but now there’s evidence that gum disease may kickstart Alzheimer’s disease as well. A study in the journal PLOS One shows that long-term exposure to periodontal disease bacteria results in inflammation and degeneration of brain neurons, at least in mice. Scientists also found periodontal bacteria DNA in the brains of mice who were infected. Researchers admit the results surprised them.
Nearly half of Americans spend most of the workday sitting… and some people have installed treadmill desks to keep moving while they work. Treadmill desks usually have a pace of only one or two miles per hours, but a new study says “not so fast.” The study in the journal PLOS One finds that people using treadmill desks have a less efficient working memory… although other types of thinking are the same whether sitting, standing, or walking.
And finally… scientists in India have uncovered a major public health threat—taking selfies. A study in the Journal of Family Medicine and Primary Care shows that worldwide, more than 250 people have died while taking selfies since 2012. The problem, researchers say, is that people go too far seeking a perfect shot… and end up drowning, falling off a cliff, or being hit by a train.