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Performance and brain electrical activity during prolonged confinement

B Lorenz1, J Lorenz, D Manzey

  • 1DLR-Institute of Aerospace Aviation and Space Technology, Hamburg, Germany.

Advances in Space Biology and Medicine
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Isolation significantly impaired tracking performance in crew members, showing a triphasic pattern of decline and recovery. Electroencephalogram (EEG) data suggest decreased alertness and fatigue contribute to performance decrements during prolonged confinement.

Area of Science:

  • Human physiology
  • Neuroscience
  • Space psychology

Background:

  • Prolonged isolation in spaceflight poses risks to crew cognitive function and performance.
  • Monitoring astronaut cognitive states is crucial for mission safety and success.

Purpose of the Study:

  • To assess the impact of a 60-day isolation period on cognitive performance and physiological state in crew members.
  • To evaluate the utility of psychometric and electroencephalogram (EEG) measures for monitoring astronaut well-being during confinement.

Main Methods:

  • A subset of the AGARD-STRES battery (memory search, unstable tracking, dual-task) was administered to isolated crew members and a control group.
  • Subjective state questionnaires and continuous EEG recordings were used to assess cognitive and physiological changes.

Related Experiment Videos

  • Quantitative single-subject analysis was applied to performance and EEG data.

    • Main Results:

    • Chamber crew exhibited significant decrements in tracking ability, characterized by a triphasic pattern of deterioration and recovery.
    • Subjective fatigue ratings were higher in the chamber crew, correlating with decreased alertness and tracking performance.
    • EEG analysis revealed changes in alpha and theta wave activity associated with task demands and individual states of alertness and fatigue.

    Conclusions:

    • Standardized psychometric tasks and EEG monitoring are feasible for assessing individual states during prolonged isolation.
    • Cognitive decrements, particularly in tracking, are linked to decreased alertness and fatigue in confined environments.
    • The findings support the adaptation of these assessment techniques for in-flight monitoring of astronauts during long-duration space missions.