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Record Details

Record 14 of 293
Gravitational adaptation of animals
Author and Affiliation:
Smith, A. H.(California, University, Davis, CA, United States)
Burton, R. R.(USAF, School of Aerospace Medicine, Brooks AFB, TX, United States)
Abstract: The effect of gravitational adaptation is studied in a group of five Leghorn cocks which had become physiologically adapted to 2 G after 162 days of centrifugation. After this period of adaptation, they are periodically exposed to a 2 G field, accompanied by five previously unexposed hatch-mates, and the degree of retained acceleration adaptation is estimated from the decrease in lymphocyte frequency after 24 hr at 2 G. Results show that the previously adapted birds exhibit an 84% greater lymphopenia than the unexposed birds, and that the lymphocyte frequency does not decrease to a level below that found at the end of 162 days at 2 G. In addition, the capacity for adaptation to chronic acceleration is found to be highly heritable. An acceleration tolerant strain of birds shows lesser mortality during chronic acceleration, particularly in intermediate fields, although the result of acceleration selection is largely quantitative (a greater number of survivors) rather than qualitative (behavioral or physiological changes).
Publication Date: Jan 01, 1982
Document ID:
19820057181
(Acquired Nov 30, 1995)
Accession Number: 82A40716
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publisher Information: United States
Contract/Grant/Task Num: NGR-05-004-008
Financial Sponsor: NASA; United States
Organization Source: California Univ.; Davis, CA, United States
School of Aerospace Medicine; Brooks AFB, TX, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCELERATION TOLERANCE; ADAPTATION; CENTRIFUGING STRESS; GRAVITATIONAL EFFECTS; LYMPHOCYTES; PHYSIOLOGICAL ACCELERATION; CHICKENS; HEREDITY; MOTION SICKNESS
Imprint And Other Notes: (International Union of Physiological Sciences, Annual Meeting, 2nd, Budapest, Hungary, July 13-19, 1980.) Physiologist, Supplement, vol. 23, Dec. 1980 (1982), p. S-113, S-114.
Availability Source: Other Sources
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