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Sechenov, founder of Russian physiology, was first to attempt investigation of the sphere of consciousness by physiologic methods. He postulated that the thinking process is of reflex nature and that psychic activity of man is therefore susceptible to objective study. He believed that the external world plays an important role in the existence of the living organism. The content of our psychic life is the reflection of the material world in special types of apperceptions, images and concepts. Nearness, distance and height of objects, direction and rapidity of movements are products of our muscle sense. This sense, manifesting itself in periodic movements, becomes the fractional analyzer of space and time. Our numerical concepts stem from the same source. The volume at hand presents a collection of essays by the great physiologist dealing with the development of his central thesis, which is the reflex nature of the process of thinking. The
Elcmenty mysli: Sbornik izbrannykh statey. JAMA. 1944;125(11):818. doi:10.1001/jama.1944.02850290058033