He stated that the physiological systems likely to be most affected by weightlessness were the musculoskeletal system, the cardiovascular system, and the equilibrium senses.
Adaptation to prolonged exposure to weightlessness or to lunar gravity may cause difficulties when the astronaut is exposed again to reentry forces and terrestrial gravity.
Major areas have been outlined in which prolonged weightlessness may be expected to interfere with performance, judgment, and, ultimately, chances of survival.
Currently, changes in calcium metabolism resulting from weightlessness over periods up to 2 weeks is not considered a hazard requiring precautionary measures.
On the basis of theoretical calculations, weightlessness can be expected to have some effect even on one individual cell if its size exceeds 10 microns in diameter ([ref.
Should prolonged weightlessness prove to be a serious detriment to health, consideration must be given to design concepts which provide artificial gravity.
Pilot Theoretical Study of the Effect of Weightlessnessand Densely Ionizing Radiation on Single Cells.
Importance is also attached to early evaluation of weightlessness effects on body-fluid equilibria.
Metabolic Effects of Weightlessness Without metabolic information, accurate planning of environmental systems for long flights is difficult.
Experiments have been selected to study the genetic and somatic effects of weightlessnesscombined with a known source of radiation (Sr^85) to determine if there are any antagonistic or synergistic effects ([ref.
General Studies of Biological Rhythmicity The effects of weightlessnesson the organism as a whole may be manifested by important changes in certain integrated behavioral patterns having an inherently rhythmic character.
Black mice 500 seconds ofweightlessness in Discoverer III via a Thor-Able rocket.
He knew it was a spaceship because he had been in one before and although the sensation of weightlessness was not present, they were in deep space.
He awoke to the faint hum of the air-pumps, got up feeling rested, forgot his weightlessness and floated to the ceiling where only an outthrust arm prevented a nasty bump on his head.
Could the effects ofweightlessness manifest themselves in that way in rare instances?
Alaric Arkalion was a queer duck, anyway, and of all the men gathered in the spaceship's lounge, he alone had masteredweightlessness with hardly any trouble.
A state of weightlessness was obtained within the Magellan.
The feeling of weightlessness vanished momentarily, then there was a moment of dizziness and a sudden sensation of being upside down.
The sensation of weightlessness you now experience," said the voice soothingly, "is natural at this stage of your flight.
Weightlessness he had experienced for brief periods during training, but nothing could match the heady impression of continuous freedom from gravity.
Biopsy of even selected brain tissues seemed to show that microscopic cellular changes due to prolonged weightlessness or primary cosmic-ray bombardment, which had been suggested by some authorities, were unimportant.
Instinct made him grab futilely outward, for the sense ofweightlessness was the same as endless fall.
He tried, still, to believe in the magnificence of it, as the thrust of rocket power ended, and the weightlessness of orbital flight came dizzily.
Handling objects in weightlessness which on Earth would be heavy was an art in itself.
The feeling of weightlessnesswas unexpectedly daunting.
It was possible to get used to weightlessness while awake.
To walk in magnetic-soled shoes in weightlessnessrequires a knack.
Haney and Joe went into the cargo-section of the rocketship and heaved its contents smoothly through weightlessness to the storage chamber above.
Sure, he'd experiencedweightlessness before, when pushing a research stratojet through a high-speed trajectory to counter the pull of gravity, for example.
The oddity of weightlessness was totally unlike anything he had expected despite the fact its symptoms had been carefully explained during the indoctrination program.
