The main contribution of research in the field of neuropsychology, the study of the relationship between brain functions and mental processes. The theory and discoveries are that Luria conducted basic research in the field of neuropsychology, studying how various brain functions affect mental processes. He developed methods of neuropsychological diagnosis and rehabilitation. The significance of Luria’s works contributed to the understanding of the brain organization of higher mental functions and the development of methods for neuropsychological diagnosis and rehabilitation.