EFFECT OF 6-DAYS OF SUPPORT WITHDRAWAL ON CHARACTERISTICS OF BALANCE FUNCTION

摘要

The role of different sensorimotor and sensory factors on postural disorders at different stages of the exposure to microgravity still remains unknown. The results obtained after the Dry Immersion (DI) exposure, showed that after 6 days of DI the subjects' ability to resist to posture perturbations was highly reduced, the EMG response of corrective muscles was increased, and the structure of corrective responses was modified, so that the equilibrium was maintained by the elimination of excessive degrees of freedom. Thus, the results of the study have revealed profound changes in postural synergies suggesting a significant contribution of the support afferentation to posture control.