Alterations of Dynamics of Human Electroencephalogram Spectral Parameters During Daily Geomagnetic Field Variations

The technique of identifying the nature of daily changes in spectral power relations of the basic rhythm brain activity and geomagnetic field variations has been proposed. There has been carried out an analysis of electroencephalogram (EEG) alpha activity spectral power recording at every minute in the morning, afternoon and evening during 5 days (12 recordings, 30 minutes each) in three healthy volunteers compared to every-minute variations of the total geomagnetic field vector (TGMFV). It has been established that in cases of increased TGMFV evening values, general alpha EEG-activity could increase, indicating an increase in internal synchronization of the brain pacemaker structures, and it could be reduced reflecting desynchronizing effects of the reticular formation on the cerebral cortex. There have been detected three variations of individual sensitivity of the brain parts to increased TGMFV indices - increased spectral power of EEG alpha-activity predominantly in the right temporal brain part, reduced spectral power of this EEG type predominantly in the left frontal-temporal brain part and a reaction of the total spectral power reduction of EEG alpha-activity

Alpha rhythm · Audiology · Brain activity and meditation · Developmental psychology · Earth's magnetic field · Electroencephalography · Evening · Local field potential · Magnetic field · Morning · Physics · Biofield Effects and Biophysics · Electromagnetic Fields and Biological Effects · Fusion and Plasma Physics Studies · Medicine · Neuroscience · Psychology · Internal Medicine