Aging is an integral part of human life, and as such it has always aroused interest and various studies. It is important to note that aging and old age are not synonymous. Aging is a process during which changes occur as a function of age. There are three basic divisions of aging: biological, psychological and social aging. Old age is the last developmental period of an individual's life, which can be defined according to chronological age, social roles or functional status. Learning and memory are key cognitive functions. Memory loss can occur due to various diseases, infections and inflammation, as well as trauma, and it can be reversible (amnesia) or irreversible (dementia). Alzheimer's dementia is the most common type of dementia that primarily occurs in elderly people, and the disease is characterized by gradual loss of memory, disturbances in speech, thinking and behavior. Symptoms and signs appear gradually, and over time they become more severe and greatly affect the independence of the affected person. The etiology of the disease has not been fully elucidated. As with other diseases, early correct diagnosis and treatment greatly influence the further course of the disease. There is no cure for dementia, but much can be done to help people with the disease and their caregivers. Certain steps are recommended to maintain an optimal quality of life by being physically active and participating in activities and social interactions that stimulate the brain and maintain daily function. In the final paper, the types of dementia are described, especially the most common, namely Alzheimer's dementia. The model of integrated care is described and also the health care of people suffering from dementia is also described, with an emphasis on nursing diagnoses and interventions.