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How is Alzheimer’s Disease Caused?


Disease is a brain illness which affects an estimated individual around the globe. There are no remedies that are effective in preventing its development that is constant or curing Alzheimer’s disease. The build-up of two proteins amyloid and tau causes disease. Tau is significant as it causes their relations and neurons to expire, from communication with one another preventing brain areas. This has been proven to occur several years before patients have any signs of disease. With time, in increasing amounts, tau starts to look. This causes the development of symptoms from Alzheimers diseases, where the loss of memory is accompanied by more changes in behavior and thinking that cause a loss of independence.

How this happens has been controversial. Spread – In our study we provide the first evidence that tau spreads between neurons that were connected. This is a vital step, because quitting freeze or this spread may prevent the signs of Alzheimer’s disease. This idea, called spread, is supported by researchers and was suggested. It’d not been shown that this process occurs in humans. Since the sum of tau recovered was comparatively high, the evidence from mouse studies was contentious, then it does in humans and disease development happened. In our study, we combined 2 advanced brain imaging techniques. The first, positron emission tomography, allows us to scan into the brain for into the existence of specific molecules.

With this, we were able to directly observe into the unnatural tau in living patients, to see precisely how considerably of it was present in every part of the brain. The 2nd, functional magnetic resonance imaging, measures the flow of blood in the brain in real time. This allowed us to observe the action produced by the brain communicating with one another. For the very first time, by scanning the same individuals with both methods, we were able to directly correlate brain connections of the mind into the distribution of unnatural tau in living people with Alzheimer’s disease. We used a mathematical method called graph analysis to analyze brain connectivity.

This method involved splitting the brain subdivision in 598 regions of equal size. We then treated the connectivity between areas as a social network, assessing factors like the number of contacts a brain area had, how many friendship groups it took part in, and how many of a brain areas contacts were also contacts of every other. In an influenza epidemic, people with a lot of social contacts are most prone to become infected and after that to pass into the infection on to others. 

Similarly, the transneuronal diffusion hypothesis predicts that strongly connected brain areas will accumulate more tau.