Chronobiological aspects of physical adaptation of the northern medical school students depending on the sex

Here are the results of a study efficiency in terms of a simple of visual and motor reaction, the students of the medical fa-culty of the northern medical school. In our study were established differences in the distribution of students by level of ef-ficiency based on gender, on chronotype. Between groups of students, male and female there was a higher functional level of the nervous system (right hand) in young men. The differences of parameters of simple visual-motor reaction between the arrhythmia and evening chronotype were expressed to a greater extent in the groups of young men: «Owl» on a number of indicators showed a higher efficiency. The percentage of young men with a «normal (optimal)» efficiency was also higher among the «owls». The parameters of simple visual-motor reaction in the group of girls with an evening and arrhythmic chronotype did not differ significantly.