[The organized brain (an essay on the principles of the design and functional organization of the brain). I].

The study of correlating the principles of the cerebral functional organization with the main mechanisms of the behavioral act is based on the necessity of joining analytical and synthetic approaches. The analysis of interrelationships between micro- and macrolevels of brain organization as well as study of the role of their relations in architecture of concrete behavioral reaction is one of the perspective ways to this problem. Two basic forms of construction and activity rigid, genetically determinate and flexibly individual--are constantly interacted in the living brain as well as in whole organism. This essay is dedicated to the development of original author's conception concerning the some structure-functional characteristics of different brain systems and main principles of organization and integration of cerebral functions.