Brain - soft nerve tissue, it should be protected by destroyers and poisons: stress, alcohol, narcotics, psychotropic drugs. In Alzheimer's disease brain cells atrophy and die "bundles". I had to deal with the disease up close.
First, the disease goes unnoticed: chudit people sometimes forget what happened yesterday, but remembers well what happened in childhood. However, there comes a critical moment, as a rule on the background of a stressful situation when the problem becomes obvious: the person loses touch with the outside world ceases to recognize the closest, he was haunted by delusions. There are periods of exacerbation when patients become unbearable. It is terrible, irreparable, but will have to adapt.
What does it happen?
In Alzheimer's disease in the brain is the deposition of protein in the form of "senile plaques" and the formation of neurofibrillary tangles of so-called, consisting of damaged neurons - both of these processes lead to the destruction of nerve pathways of the brain.
While still not clear what exactly causes these changes, but in recent years, scientists were able to identify specific genes responsible for human predisposition to Alzheimer's disease.
And what is interesting: the disease is more common in poorly educated people with unskilled occupations. A person with high intelligence are less likely to face the manifestations of this disease for the reason that it has a greater number of connections between nerve cells. So when the death of some cells lost the functions can be transferred to others who have not previously been involved.