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Human cognitive performance in spaceflight and analogue environments.

Gary E Strangman1, Walter Sipes, Gary Beven

  • 1Department of Psychiatry, Harvard Medical School, Boston, MA, USA.

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Cognitive performance in spaceflight is crucial. This review found no strong evidence for specific cognitive deficits during long-duration missions, but noted individual variability in response to novel environments.

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Area of Science:

  • Space exploration
  • Human factors
  • Cognitive neuroscience

Background:

  • Maintaining cognitive function is vital for astronaut performance during space missions.
  • Previous reviews have not comprehensively analyzed long-duration (>21 days) spaceflight cognitive studies.
  • Spaceflight and analogue environments present unique challenges to human cognition.

Purpose of the Study:

  • To review and summarize existing studies on cognitive performance in long-duration spaceflight and analogue environments.
  • To identify trends and gaps in the current research on spaceflight-induced cognitive changes.
  • To assess the evidence for specific cognitive deficits in low Earth orbit.

Main Methods:

  • Systematic review of published studies focusing on long-duration spaceflight (>21 days) and analogue environments.
  • Inclusion of 11 long-duration spaceflight studies (N=42 subjects) and 21 shorter spaceflight studies (N=70 subjects).
  • Inclusion of 55 spaceflight analogue studies with durations ranging from 6 to 520 days.

Main Results:

  • The diverse methodologies precluded a formal meta-analysis.
  • Current evidence is insufficient to strongly confirm or deny specific cognitive deficits in long-duration low Earth orbit missions, likely due to small sample sizes.
  • Novel environments consistently induce variable cognitive performance changes across individuals.

Conclusions:

  • Individual variability in cognitive responses to spaceflight is significant and requires further investigation.
  • Understanding the factors contributing to interindividual differences is essential for predicting in-flight cognitive functioning.
  • Further research with larger sample sizes is needed to clarify cognitive changes during extended space missions.