[Autonomic support for mental activities of different degrees of complexity in younger school-age children].

We have been studying peculiarities of vegetative provision of mental activity with different level of difficulty. It was revealed that efficiency of mental activity of children from junior school depends on the difficulty of the given visual information and vegetative provision. It was proved that children from junior school had the highest level of mental activity with easiest tasks, but vegetative provision was minimal. When the task became more difficult earning capacity of the brain was down but we saw more expressed change in vegetative provision. In case of the highest level of visual information presentations we saw the lowest level capability of the brain but reducing of vegetative provision. We discussed mechanisms of the links between working ability of the brain and vegetative provision of mental activity of different difficulty level.