NEUROPHYSIOLOGICAL STATE OF HUMANS IN LONG-DURATION ISOLATION

During the 520-d imitation of isolation and confinementin a long-duration exploration mission, the neuroufunctional state of 6 crewmembers was studied by synchronous registration of cerebral electrical (EEG) and energy (permanent potential level (PPL)) activities of the brain. Two baseline investigations predicted high adaptability of all crew members and low probability of depletion of the adaptation reserve in the experiment. During isolation, dynamics of neurofunctional correlates of the cerebral activity was generally proportionate to the factors the crewmembers were affected by. Events epochal to the crew gave rise to physiological reactions both of the metabolic and electrical activity of the brain. On week 54, crew physiological adaptation to the experimental environment was manifested by decreases in PPL without interhemispheric asymmetry and absolute a-power. All through the experiment none of the crew members showed signs of a distinct stress-reaction (a-activity asymmetry with a significant PPL decrease) supporting our prediction of low probability of adaptation reserve depletion in participants in the 520-day isolation and confinement study.