The article focuses on the analysis of the functioning of the category of the dimension of memory and psychological perception of time by a person suffering from dementia of the Alzheimer type. Our observations were related to the theoretical understanding of psychology researchers memory, psychological perception of time and neuropsychologists. Moving away from a clinical study for the analysis of expression resulting in interaction with investigating, while the participant conversation here is aware of the procedure. This research methodology allows us to grasp the dynamics of changes in the behavior of the test and explore the essence of co-occurring in this type of dementia, cognitive and language. In the first part of the approximate sketch is necessary to understand the practical part, the terminology concerning the psychology of memory, temporal horizon of human rights and basic definitions and assumptions Medical on Alzheimer’s. As part of the empirical analysis of the material shows that due to the disintegration of autobiographical memory adult has difficulty organizing his own experiences and events. As a result, systematically loses the ability to plan for the future, both the distant, perspective, and the next.