A study of frequency characteristics of electroencephalograms (EEG) in high school students during increasing, maximum, decreasing and minimum duration of daylight has been conducted. In the paper, dynamics of the main EEG rhythms has been presented, their relationship with periods of daylight has been established. There has been revealed dominance of alpha and delta activity in contrasting seasons, periods favorable for the brain functioning and development of higher mental functions have been defined.

In the article, there have been presented the results of the correlation and factor analysis of indicators of visual-motor activity in 230 children aged 8-10 years with the normal (144 persons) and high (86 persons) levels of anxiety. It has been established that high anxiety affected negatively the process of voluntary attention and the link of regulation and control of the senso-motor reactions course, it lead to impairment of visual-motor activity’s qualitative characteristics. Keywords: children, anxiety, visual-motor activity