Alzheimer’s disease is one of the most frequent causes of dementia (weak-mindedness) at elderly and senile age. Dementia is characterized by the expressed decline of intellectual functions of the person with ability disorders of surrounding conditions and independent actions. The disease is called by the name of A. Alzheimer, who described this form of illness in 1906. In the absence of treatment the disease steadily progresses and leads to the destruction of all mental functions. The etiologies of Alzheimer’s disease are not finally found out. There is a lot of data, testifying to the hereditary nature of the disease. However, there are the cases not caused by the hereditary predisposition, especially at later onset of the disease. Alzheimer’s disease can begin after the age of 50, but more often arises after 70 and especially after 80.

Alzheimer’s disease is the disease connected with the destruction of brain cells and leading to a heavy frustration of memory, intelligence, other cognitive functions, and also to serious problems in emotional and behavioral spheres. “Alzheimer’s disease is the most common cause of dementia. It now afflicts nearly 4 million Americans. These numbers are expected to increase dramatically as the U.S. population ages. By the year 2050 approximately 14.5 million people will suffer from Alzheimer’s disease” (Handy: 1998) Alzheimer’s disease is insidious and develops gradually. It affects not old and full of strength people. The first signs of disease are memory and attention disorders. New information is perceived worse. A person becomes forgetful, absent-minded, current events are substituted by the revival of memoirs in the past. As a rule, early stages of the disease are marked by time orientation disorders. The representation about time sequence of events is broken. In other cases illness begins with changes in character of the