+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > DiZio, P.  Author > Lackner, J. R.  NASA Center > NASA (non Center Specific)  Publication Year > 1991-2000 > 2000  Subject > A-C > Aerospace Medicine  Availability Options > Order From Other Sources  Item/Media Type > Journal Article  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Human orientation and movement control in weightless and artificial gravity environments Author(s): Lackner, J. R.; DiZio, P. Abstract: Our goal is to summarize what has been learned from studies of human movement and orientation control in weightless conditions. An understanding of the physics of weightlessness is essential to appreciate the dramatic consequences of the absence of continuous contact forces on orientation and posture. Eye, head, arm, leg, and whole body movements are discussed, but only experiments whose results seem relatively incontrovertible are included. Emphasis is placed on distinguishing between virtually immediate adaptive compensations to weightlessness and those with longer time courses. The limitations and difficulties of performing experiments in weightless conditions are highlighted. We stress that when astronauts and cosmonauts return from extended space flight they do so with both physical "plant" and neural "controller" structurally and functionally altered. Recent developments in adapting humans to artificial gravity conditions are discussed as a way of maintaining sensory-motor and structural integrity in extended missions involving transitions between different force environments. NASA Center: NASA (non Center Specific) Publication Date: Jan 2000 Document Source: Other Sources No Digital Version Available: Go to Tips On Ordering Document ID: 20040141698 Publication Information: Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale, Volume 130, 1, 2-26, ISSN 0014-4819 Keywords: ACTIVITY (BIOLOGY); AEROSPACE MEDICINE; ARTIFICIAL GRAVITY; GRAVITATIONAL PHYSIOLOGY; MANUAL CONTROL; MOTION; ORIENTATION; WEIGHTLESSNESS; WEIGHTLESSNESS SIMULATION; NASA Discipline Neuroscience; NASA Program Biomedical Research and Countermeasures; Non-NASA Center; Flight Experiment; Parabolic Flight; STS Shuttle Project; manned; short duration; Review; Review, Academic; PARABOLIC FLIGHT; SPACE SHUTTLE MISSIONS; Accessibility: Unclassified; Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2006-08-02 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007