Dementia is a common name for a group of symptoms caused by a brain disorder. Dementia is a form of chronic brain syndrome with multiple cognitive impairments, the most important of which is memory impairment. Alzheimer's dementia is the most common and well-known form of dementia, and is responsible for two-thirds of cases. Alzheimer's dementia is a long, severe, incurable and debilitating disease for the affected person and their family. A sick person needs all the support of her family through this dementia. The most common symptom of dementia is forgetfulness and loss of time and space, so the patient is constantly dependent on the care of another person. The cause of the disease is unknown, but there are a number of theories, from genetics to transient pathological conditions. According to the World Health Organization, the number of patients in 2010 was estimated at 35.6 million, and the number of patients is expected to almost double in the range of 20 years, to 65.7 million in 2030 and 115.4 million in 2050. year. Recent research includes improved clinical diagnostic guidelines and improved treatment of cognitive disorders and behavioral problems. Future directions in the research and treatment of patients with AD include: the application of functional brain imaging techniques in early diagnosis and the assessment of treatment effectiveness; development of new classes of drugs that act on different neurotransmitter systems, both for the treatment of cognitive deficits and for the treatment of behavioral disorders. The care of medical staff in the care of a person with Alzheimer's dementia begins in the first phase where the family is educated and counseled. In the second phase of dementia, an increase in nursing intervention is implied, and in the third phase, the care of a nurse is considered to be more than necessary. The role of a physiotherapist in Alzheimer's dementia is to encourage the patient to functionally move and engage in physical activity, thus linking an individual's physical and mental abilities.