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Journal of the American College of Nutrition, Vol. 26, No. 90005, 549S-554S (2007)
Published by the American College of Nutrition

Dehydration and Cognitive Performance

Ann C. Grandjean, EdD, FACN and Nicole R. Grandjean, PhD

The Center for Human Nutrition, Omaha, Nebraska (A.C.G.)
Pate Rehabilitation, Dallas, Texas (N.R.G.)

Address reprint requests to: Ann C. Grandjean, Executive Director, The Center for Human Nutrition, Room 1024 505 Durham Research Plaza, Omaha, Nebraska 68105. E-mail: agrandje{at}unmc.edu

Human neuropsychology investigates brain-behavior relationships, using objective tools (neurological tests) to tie the biological and behavior aspects together. The use of neuropsychological assessment tools in assessing potential effects of dehydration is a natural progression of the scientific pursuit to understand the physical and mental ramifications of dehydration. It has long been known that dehydration negatively affects physical performance. Examining the effects of hydration status on cognitive function is a relatively new area of research, resulting in part from our increased understanding of hydration's impact on physical performance and advances in the discipline of cognitive neuropsychology. The available research in this area, albeit sparse, indicates that decrements in physical, visuomotor, psychomotor, and cognitive performance can occur when 2% or more of body weight is lost due to water restriction, heat, and/or physical exertion. Additional research is needed, especially studies designed to reduce, if not remove, the limitations of studies conducted to date.

Key words: dehydration, cognitive function, cognitive performance, fluid restriction, exercise, heat







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Copyright © 2007 by the American College of Nutrition.