... reflexes ," "spaceflight ," "microgravity ," "weightlessness ," "gravity ," and "postural ." Searches of the MANTIS database and the Index to Chiropractic Literature using the same key word were also performed ... illustrate and compare the effects of gravitational changes upon the cervical spine postural reflexes and resultant postural adaptations Specifically, details of postural adaptation, musculoskeletal ... to earth's gravity Perhaps the best way to study the effects of gravity upon the human spine and nervous system is to study humans as they actively adapt to environments where the gravitational...