The article presents the results of a research of the functional state of the central nervous system of medical students studying in a Northern region. The study was based on such parameters of variational chronoreflexometry as the latent period of a simple visual-motor reaction, CNS functional level, response level, the functional level of the system. The study involved 94 girls of 1-2 years of study; the average age of students was 19.7±1.59 years. The analysis of the CNS characteristics of female students re-vealed a slightly reduced level of performance, combined with signs of the inhibition process, fatigue and body stress-reaction to the hypocomfort climatogeographic educational environment. The reduced functional level of the central nervous system and the latent period of response to visual stimuli in most of the examined students indicated weaker perceptual processes and lower psychomotor control of the body activity.