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The NASA Performance Assessment Workstation: cognitive performance during head-down bed rest.
R L Shehab1, R E Schlegel, S G Schiflett
1University of Oklahoma-Norman 73019, USA.
Acta Astronautica
|September 7, 2001
Summary
Cognitive performance in males showed slight improvement during head-down bed rest, with no significant performance differences compared to control periods. Fatigue levels remained stable throughout the study.
Area of Science:
- Space physiology
- Human factors engineering
Background:
- Head-down bed rest simulates microgravity effects on human physiology.
- Cognitive performance is crucial for astronaut health and mission success.
Purpose of the Study:
- To assess cognitive performance changes in males during 17 days of 6-degree head-down bed rest.
- To evaluate the impact of bed rest on attention, memory, and tracking abilities.
Main Methods:
- Utilized the NASA Performance Assessment Workstation (PAWS) with six cognitive tasks.
- Included subjective fatigue and mood assessments.
- Employed training, practice, bed rest, and recovery trial phases.
Main Results:
- Observed a slight performance improvement trend across trials after initial stabilization.
- Performance improvement was enhanced during the recovery phase for most tasks.
- No statistically significant differences in cognitive performance were found between bed rest and control periods.
Conclusions:
- 17 days of head-down bed rest did not significantly impair cognitive performance.
- Subjective fatigue levels remained largely unchanged.
- Cognitive functions may adapt or improve during prolonged bed rest, warranting further investigation.