This is the most common form of dementia which exists. It implies the irreversible and progressive loss (over the years) of intellectual capacity, including memory, the ability to express oneself and communicate efficiently, the ability to organize a day-to-day existence and have an autonomous family, work and social life.
In the brain of Alzheimer sufferers the following can be observed: neuron loss, the deposits of the beta-amyloid protein and injuries to the neurons themselves, called neurofibrillary lesions. This illness owes its name to Alois Alzheimer, a German doctor who described the first case at the beginning of the 19th Century.