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PTS performance by flight- and control-group macaques.

D A Washburn1, D M Rumbaugh, W K Richardson

  • 1Sonny Carter Life Sciences Laboratory, Language Research Center, Georgia State University, Atlanta, USA. dwashburn@gsu.edu

Journal of Gravitational Physiology : a Journal of the International Society for Gravitational Physiology
|September 7, 2001
PubMed
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Spaceflight and simulations disrupt psychomotor performance in monkeys. Flight animals experienced greater performance decrements after space missions compared to ground controls.

Area of Science:

  • Primate research
  • Space biology
  • Neuroscience

Background:

  • The Psychomotor Test System was developed for spaceflight research.
  • Nonhuman primates are used to study the effects of spaceflight on cognitive and motor functions.

Purpose of the Study:

  • To assess the impact of spaceflight on psychomotor performance in rhesus monkeys.
  • To compare the effects of actual spaceflight versus ground simulation on task performance.

Main Methods:

  • Twenty-five young rhesus monkeys (Macaca mulatta) were trained on the Psychomotor Test System.
  • Four monkeys (two flight, two control) performed psychomotor tasks before and after a 14-day Bion 11 spaceflight or ground simulation.
  • Control monkeys underwent a similar period on the ground, including anesthesia for procedures.
Keywords:
NASA Discipline Space Human FactorsNASA Experiment Number 8808A09Non-NASA Center

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Main Results:

  • Both flight and control groups showed significant performance disruption after the 14-day period.
  • Performance decrements were more pronounced in the monkeys that experienced actual spaceflight.
  • The study highlights the challenges of maintaining cognitive and motor skills during space missions.

Conclusions:

  • Spaceflight, even for a short duration, significantly impairs psychomotor function in primates.
  • Ground simulations can partially replicate these effects, but spaceflight appears to exacerbate them.
  • Further research is needed to understand and mitigate these performance deficits for long-duration space exploration.