The disease begins with mild forgetfulness and then spreads to other functional areas. As a result, this leads to the inability to overcome the difficulties of everyday life. The clinic of the disease, which does not yet fully reflect the entire complex of symptoms, as well as the severity, is close to the syndrome of dementia. It is considered sufficient violations of colloquial speech, as well as the presence in everyday life of multiple cognitive changes. The degree of dementia is determined through an assessment of leading an independent life. The mild degree is characterized by independent activity, although limited, but independence in ordinary life is preserved. Moderate dementia is limited to independence and the patient needs outside help on a daily basis.