Lenin's theory of reflection and Pavlov's teaching on higher nervous activity.
D000818:Animals; D005075:Biological Evolution; D001921:Brain / Q000502:physiology; D003148:Communism; D003214:Conditioning, Classical / Q000502:physiology; D006801:Humans; D008606:Mental Processes / Q000502:physiology; D011057:Politics; D012677:Sensation / Q000502:physiology; D014586:USSR