[Neurophysiological patterns of vestibular adaptation to microgravity].

Results of the investigation of spontaneous and evoked by vestibular, ocular, and combined oculo-vestibular stimulation of the oculomotor reactions within space experiments Optokinesis and Labyrinth are presented. The experiments were carried out during the early adaptation to micro-g and repeated throughout long term mission. As was shown, the vestibular disturbances at the start of micro-g were not a lot of isolated individuals but regular reactions of the body sensory systems to the micro-g environment. Dynamic studies of the neurovestibular adaptive shifts in long-term microgravity allowed to register periodically evolving abnormal spontaneous and induced oculomotor reactions. Adaptation periods interchanged with the episodes of disadaptation. The periods of vestibular adaptation to microgravity and possible neural mechanisms of these events are presented.