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High-resolution scans pinpoint the exact part of the brain where Alzheimer's begins - and trace its spread
Scientist from Columbia University in New York made the discovery
They found the disease starts in the lateral entorhinal cortex (LEC)
It is linked to the part of the brain where long-term memories are stored
Study also outlined how the disease spreads from the LEC to the rest of the brain
Des chercheurs australiens et américains viennent de réaliser une jolie prouesse dans le domaine du vieillissement. En étudiant de l'ADN, ils ont compris comment faire à nouveau communiquer notre génome (classique) avec notre génome mitochondrial grâce à une molécule baptisée NAD (Nicotinamide adenine dinucleotide) que nous avons en grande quantité quand nous sommes jeunes et qui va en décroissant après nos 20 ans.
Ils ne se sont pas contentés de stopper le vieillissement, mais ont réussi à l'inverser. Les tests sur les souris sont concluants. Avec ce traitement, une vieille souris devient plus énergique, a plus de tonicité dans les muscles, voit ses inflammations (arthrite, fragilité des muscles...etc.) diminuer et même dire adieu à son diabète.
http://www.abc.net.au/news/2013-12-20/scientists-develop-anti-ageing-process-in-mice/5168580
When you walk into a shoe store, you'll see a ton of options for different types of shoes. The thing is, those shoe types don't really have an effect on whether or not you get injured, and according to the BBC, it's best to just find a pair that's comfortable. P
The BBC took a look at a wide range of studies from the last few years and found that based on current research, the type of shoe you wear is basically irrelevant in injury prevention:
Vischeck draws on algorithms developed at many different vision laboratories around the world. In particular, the interactive online demo owes a great deal to a 1997 paper by Brettel, Vienot and Mollon entitled "Computerized simulation of color appearance for dichromats" and to recent work from Brian Wandell's group at Stanford. Our info page contains a more complete list of references.
Researchers at Duke University and elsewhere found that participants who’d reported becoming dependent on pot by age 18 showed a drop in IQ score between ages 13 and 38. The findings suggest pot is harmful to the adolescent brain, the researchers said