NONSPECIFIC BRAIN SYSTEMS OF WOMEN AT REST AND ACTIVE WAKEFULNESS ON DAYS WITH DIFFERENT HELIOGEOMAGNETIC CONDITIONS OF THE EARTH
The paper presents a personalized analysis of the bioelectrical activity of the brain (EEG) of practically healthy females aged 50-60 years on days of weak geomagnetic disturbances (Kp=4) and on geomagnetically quiet days. The EEG segments of both hemispheres were analyzed with the determination of the frequency-amplitude and index characteristics of the brain regions, in a state of calm wakefulness and when the subjects were presented with a functional test with eye opening. reflecting adaptive reactivity. In this case, disturbances are predominantly manifested in the slow-wave spectrum and in the slow-frequency range of fast activity. An opposite correlation of theta and predominantly delta waves with a low-frequency beta rhythm was revealed. Opening the eyes is accompanied by a violation of the balance observed at rest between the activating and deactivating mechanisms of nonspecific brain systems, with an overwhelming predominance of activating processes. An increase in the activity of the magnetic sphere when the eyes are opened disrupts this mechanism, strengthening the deactivating (inhibitory) component and causing insufficiency of activating processes. At the same time, the closest opposite relationship was traced between the delta index and the low frequency beta rhythm index.