INVERSE DYNAMIC INVESTIGATION FOR VOLUNTARY TRUNK MOVEMENTS IN WEIGHTLESSNESS: A NEW MICROGRAVITY-SPECIFIC STRATEGY AT THE INTERFACE POINT

摘要

The present investigation is the first attempt of dynamic quantitative assessment of the exchanged forces and moment at the restraints during voluntary posture perturbation movements from anchored stance in long term microgravity exposure. Inverse dynamic modeling and total angular momentum quantitative assessment are proposed and validated. A new microgravity-specific biomechanical constraint is highlighted. Results indicate the emergence of a microgravity-specific motor strategy aiming at the minimization of the ankle net moment, suggesting the existence of a control of the muscular effort and torques exchange at the interface with the external world.