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Cognitive function at high altitude

A F Kramer1, J T Coyne, D L Strayer

  • 1Department of Psychology, University of Illinois, Champaign 61820.

Human Factors
|June 1, 1993
PubMed
Summary
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High altitude climbing impairs learning, memory, and task performance. These cognitive and sensory-motor deficits may persist long after returning to sea level.

Area of Science:

  • Physiology
  • Environmental Medicine
  • Human Performance

Background:

  • Altitude exposure significantly impacts physiological and cognitive functions.
  • Understanding these effects is crucial for individuals undertaking high-altitude expeditions.

Purpose of the Study:

  • To investigate the effects of high altitude on human performance and cognition.
  • To assess learning, retention, and sensory-motor task performance in climbers.

Main Methods:

  • A field study was conducted on Mount Denali, Alaska.
  • Climbers performed perceptual, cognitive, and sensory-motor tasks before, during, and after ascent.
  • A matched control group performed tasks at sea level for comparison.

Main Results:

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  • Climbers exhibited deficits in learning and memory task retention compared to the sea-level control group.
  • Task performance speed was reduced in climbers, indicating potential long-term impairments.
  • These deficits suggest that repeated high-altitude exposure may lead to sustained cognitive and performance decrements.

Conclusions:

  • High altitude exposure negatively affects cognitive functions, including learning and memory.
  • Performance decrements observed in climbers may indicate long-lasting effects of altitude.
  • Further research is warranted to understand the long-term implications of high-altitude exposure on human performance.