Document Detail

Acute physiological responses of squirrel monkeys exposed to hyperdynamic environments.
MedLine Citation:
PMID:  6545937     Owner:  NLM     Status:  MEDLINE    
This study examined the responses of small primate, the squirrel monkey, to acute exposures to hyperdynamic environments. Body temperature, heart rate, and behavior of four restrained squirrel monkeys were recorded. After baseline monitoring at 1 G, monkeys were exposed to: a) +2 Gz for 60 min, b) a hyperdynamic profile simulating the gravitational envelope of the space shuttle during launch (8 min, +2.9 Gz max), or c) a simulated shuttle re-entry profile (19 min, +1.7 Gz max). In all experiments, the colonic temperature started to fall within 10 min of the onset of centrifugation and declined by as much as 2 degrees C in some conditions. This was in contrast to the stable body temperature observed during the baseline period. Also, the heart rate showed distinct elevations during centrifugation. Heart rate subsequently declined to baseline levels during the post-centrifugation phase. Behaviorally, after the onset of centrifugation, the animals periodically appeared to become drowsy and fall asleep. On the other hand, during the control period they tended to be alert, shifting their gaze about the cage. Thus, primates are susceptible to acute exposures to hyperdynamic fields, demonstrating significant physiological and behavioral changes.
C A Fuller
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Aviation, space, and environmental medicine     Volume:  55     ISSN:  0095-6562     ISO Abbreviation:  Aviat Space Environ Med     Publication Date:  1984 Mar 
Date Detail:
Created Date:  1984-06-07     Completed Date:  1984-06-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7501714     Medline TA:  Aviat Space Environ Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  226-30     Citation Subset:  IM; S    
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MeSH Terms
Behavior, Animal
Body Temperature
Cebidae / physiology*
Gravitation / adverse effects*
Heart Rate
Hypothermia / etiology
Saimiri / physiology*
Sleep Stages
Space Flight*
Tachycardia / etiology
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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