Abstract
The author's major conception concerning the associative brain systems (thalamoparietal and thalamo-frontal) as the behavior control system are presented. The participation of association systems in performance of higher brain functions, due to the entrance of the whole information spectrum of biological and signal significance and the presence of neuronal plastic mechanisms, ensures the mechanisms for retrieving the whole behavior programs from long-term memory, the ability of short-term storing of behavior programs, and estimation of their adequacy on the ground of dominanta and conditioning mechanisms.