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Science 13 July 1984:
Vol. 225. no. 4658, pp. 219 - 221
DOI: 10.1126/science.6729479
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Articles

Science, Vol 225, Issue 4658, 219-221
Copyright © 1984 by American Association for the Advancement of Science

articles

Mass discrimination during prolonged weightlessness

H Ross, E Brodie, and A Benson

Thresholds for mass discrimination under zero gravity in flight were found to be higher by a factor of about 1.8 than those for weight discrimination before flight. This suggests that humans are not as sensitive to inertial mass as they are to weight, and that adaptation can only partially compensate for loss of gravity. Weight discrimination thresholds were raised for 2 or 3 days after flight, suggesting an aftereffect of adaptation to weightlessness.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)