title: Summary of medical investigations in the U.S.S.R. manned space missions.
abstract: The results of biomedical investigations carried out in the U.S.S.R. manned space missions are discussed. Their basic result is well-documented evidence that man can perform space flights of long duration. The investigations have demonstrated no direct correlation between inflight or postflight physiological reactions of crewmembers and flight duration. In all likelihood, this can be attributed to the fact that special exercises done inflight efficiently prevented adverse effects of weightlessness. However, human reactions to weightlessness need further study. They include negative calcium balance and anemia as well as vestibulo-autonomic disorders shown by crewmembers at early stages of weightlessness. Attention should be given to psychological, social-psychological and ethical problems that may also limit further increase in flight duration.
authors.affiliation: Institute of Biomedical Problems, USSR Ministry of Health, Moscow.
authors.forename: O G
authors.initials: OG
authors.lastname: Gazenko
authors.forename: A M
authors.initials: AM
authors.lastname: Genin
authors.forename: A D
authors.initials: AD
authors.lastname: Egorov
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D000337:Aerospace Medicine / Q000639:trends*; D015992:Body Mass Index; D015519:Bone Density; D002320:Cardiovascular Physiological Phenomena; D006339:Heart Rate; D006439:Hemodynamics; D006441:Hemoglobin A / Q000378:metabolism; D006801:Humans; D007024:Hypotension, Orthostatic; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology; D005082:Physical Exertion; D013026:Space Flight / Q000639:trends*; D014586:USSR; D014893:Weightlessness; D018544:Weightlessness Countermeasures
chemical_list: D006441:Hemoglobin A