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  • 1
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    Some clinical aspects of prolonged clinostatic hypokinesia (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Attendant problems which arise with prolonged confinement of patients to bed are discussed. These disorders are of a hyperkinesic nature, and the symptoms are treated with pharmacological substances.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-TM-75114
    Format: application/pdf
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  • 2
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    Bioelectric activity of skeletal muscle under conditions of alternating action of g-Forces and weightlessness (1975)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: The bioelectric activity of the musculature of animals and man was studied during alternating g-forces and weightlessness. The appropriate conditions were reproduced in flight along a parabolic curve; in this case, weightlessness lasting 25-30 sec alternated with g-forces of about 2 g magnitude. Quite regular changes in the bioelectric activity of various groups of muscles were disclosed under g-forces and in weightlessness. Thus, muscle biopotential amplitudes of 130-180 microvolt in horizontal flight, increased to 190-330 microvolt under g-forces. In the subsequent weightlessness, an abrupt reduction in oscillation voltage was observed and, in a number of cases, phenomena, similar to the picture of bioelectric silence were noted.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 239-245
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  • 3
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    Motor activity under weightless conditions (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: The material presented on the motor activity under weightless conditions (brief and long) leads to the conclusion that it is not significantly disrupted, if those being examined are secured at the workplaces. Some discoordination of movement, moderately expressed disruption of the precision of reproduction of assigned muscular forces, etc., were observed. Motor disorders decrease significantly in proportion to the length of stay under weightless conditions. This apparently takes place, as a consequence of formation of a new functional system, adequate to the conditions of weightlessness. Tests on intact and labyrinthectomized animals have demonstrated that signaling from the inner ear receptors is superfluous in weightlessness, since it promotes the onset of disruptions in the combined work of the position analyzers.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 245-265
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  • 4
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    Astronaut activity in weightlessness and unsupported space (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: For the purpose of study of the performance ability of a human operator in prolonged weightless conditions was studied by the following methods: (1) psychophysiological analysis of certain operations; (2) the dynamic characteristics of a man, included in a model control system, with direct and delayed feedback; (3) evaluation of the singularities of analysis and quality of the working memory, in working with outlines of patterned and random lines; and (4) biomechanical analysis of spatial orientation and motor activity in unsupported space.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 383-429
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  • 5
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    Problem of artificial gravity from the point of view of experimental physiology (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: Artificial gravity in spacecraft and orbital stations is considered as prophylactic method for preventing disorders under weightlessness conditions and for readaptation of astronauts to the gravity of earth. The creation of 0.28 to 0.31 g artificial gravity during weightlessness is adequate to orient the human body in space, to preserve movement coordination, as well as to maintain the necessary level of certain physiological indices. This range of artificial weightiness can be reached by various angular accelerations of the satellite rotation as a function of the radius or orientation.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 351-357
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  • 6
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    Condition of cardiovascular systems of astronauts during flight of Soyuz orbital station (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: Extensive studies of blood circulation functions during manned space flight demonstrated a pronounced tendency toward an increase in minute volume of the blood and a decrease in pulse wave propagation rate. Individual blood circulation indices had large amplitude fluctuations. Physical work loads caused slow recovery of heart rate, arterial pressure and minute blood volume.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 147-173
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  • 7
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    Some results of biomedical studies carried out in the Gemini and Apollo programs (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: Biomedical changes in Gemini and Apollo astronauts indicate physiological shifts in the majority of organs and systems of the body during space flight. Weightlessness conditions affected body weight, blood circulation, hematological indices, metabolisms, etc. Prophylactic measures to minimize the various physiological and psychological effects constitute activity and rest cycles, supplementary potassium addition to space food, artificial gravity, etc.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 429-482
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  • 8
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    Vestibular reactions of astronauts during flight in Voskhod spacecraft (1975)
    In:  CASI
    Details
    Publication Date: 2006-05-09
    Description: It is shown that differing human vestibular resistances to weightlessness stress are connected with the nonuniform initial sensitivity of the vestibular apparatus, as well as with different lengths of vestibular training. However, intensive vestibular training of persons with a moderate degree of sensitivity of the vestibular analyzer does not ensure vestibular stability under weightlessness conditions.
    Keywords: AEROSPACE MEDICINE
    Type: Weightlessness: Med. and Biol. Res. (NASA-TT-F-16105); p 91-98
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  • 9
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    Ionizing radiation (1975)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The biological effects of ionizing radiation encountered in space are considered. Biological experiments conducted in space and some experiences of astronauts during space flight are described. The effects of various levels of radiation exposure and the determination of permissible dosages are discussed.
    Keywords: AEROSPACE MEDICINE
    Type: NASA, Washington Found. of Space Biol. and Med., Vol. 2, Bk. 2; p 473-531
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  • 10
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    Physiology of the sensory sphere under spaceflight conditions (1975)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Information regarding the influence on sensory perception of certain space flight factors, including weightlessness, acceleration, and vibration, is presented. Several illusions which occur under these conditions are described. The results of ground based experiments are also discussed.
    Keywords: AEROSPACE MEDICINE
    Type: NASA, Washington Found. of Space Biol. and Med., Vol. 2, Bk. 2; p 571-599
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