ORBELI Leon Abgarovich

(1882-1958), Soviet physiologist. Conducted research in neurochemistry, autonomic nervous system, the subcortical centers of the brain. As one of the founders of evolutionary physiology, paid much attention to the problems of the genesis of the mental, the formation of the second signal system and its relationship with the first (cm. Signaling system) '. Defending the natural-science orientation of psychology and stressing the need for close communication between the physiological and psychological studies, . studied the neurophysiological mechanisms of human creative activity, . physiological problems of professional work in extreme conditions (the work of divers, . flight crews and others).,