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We performed neuropsychological testing in eight world class climbers who had reached summits higher than 8,500 meters without supplementary oxygen. Five had mildly impaired concentration,short-term memory,and ability to shift concepts and control errors.There were no defects in perception or other cognitive activities.The pattern of impairment suggests malfunctioning of bifronto-temporo-limbic structures.Repeated extreme- altitude exposure can cause mild but persistent cognitive impairment. |
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