Mental activity is activity of the whole organism-environment system, and the traditional psychological concepts describe only different aspects of organization of this system. Therefore, mental activity cannot be separated from the nervous system, but the nervous system is only one part of the organism-environment system.

from The Theory of the Organism-Environment System (1998)

Portrait of Timo Järvilehto

Timo Järvilehto

Professor of Psychology

Timo Järvilehto is a professor of psychology at the University of Oulu in Finland, focusing on brain research and psychophysiology, EEG problems, sensory physiology and psychophysics, registration of behavior and the activity of individual neurons, especially from the human peripheral nervous system. Järvilehto has published several works dealing with the principles of brain function, learning, and education.

Since 1990, Järvilehto has developed a new approach to the examination of psychological problems under the title “systemic psychology,” which is based on the theory of the organism-environment system and which aims to combine the central psychological trends that developed during the twentieth century (functionalism, behaviorism, psychoanalysis, cognitive science) into a unified and coherent psychological theory.

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