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The affects of heat strain and dehydration on cognitive function

Conference Paper


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Abstract


  • Many groups have investigated cognitive performance during hyperthermia and dehydration, with

    few demonstrating convincing and unequivocal influences. Some reports show neither thermalnor

    hydration-induced influences, others have found improved, whilst some report reduced

    cognitive performance. This confusion has arisen due to methodological limitations that have

    resulted in many previous experiments not being optimally designed to evaluate these effects. For

    instance, few studies have appropriately induced hyperthermia and dehydration, and then

    clamped these states during the cognitive challenge. Many investigators have used physical

    exercise to induce these states, yet exercise may independently affect cognitive performance.

    Furthermore, task difficulty has rarely been controlled across cognitive functions, with the

    difficulty level for many tasks being too low, whilst inter-task comparisons have often been

    performed across different levels of difficulty. The former introduces bias, such that only

    performance decrements can be observed, whilst the latter renders it almost impossible to

    compare either the baseline data or subsequent changes in cognitive performance during altered

    thermal and hydration states. As a consequence of these limitations, our understanding of the

    affects of these stresses upon cognitive performance is less than optimal, and this study was

    designed to address these design limitations.

Authors


  •   van den Heuvel, Anne (external author)
  •   Croft, Rodney J.
  •   Haberley, Benjamin (external author)
  •   Hoyle, David (external author)
  •   Taylor, Nigel A.S.. (external author)

Publication Date


  • 2013

Citation


  • van den Heuvel, A. M. J., Croft, R. J., Haberley, B. J., Hoyle, D. J. R. & Taylor, N. A.S. The affects of heat strain and dehydration on cognitive function. In: Cotter, J. D., Lucas, S. JE. & Mündel, T. editors. Proceedings of the 15th International Conference on Environmental Ergonomics; New Zealand: International Society for Environmental Ergonomics; 2013. 72-74.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1827&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/814

Start Page


  • 72

End Page


  • 74

Place Of Publication


  • New Zealand

Abstract


  • Many groups have investigated cognitive performance during hyperthermia and dehydration, with

    few demonstrating convincing and unequivocal influences. Some reports show neither thermalnor

    hydration-induced influences, others have found improved, whilst some report reduced

    cognitive performance. This confusion has arisen due to methodological limitations that have

    resulted in many previous experiments not being optimally designed to evaluate these effects. For

    instance, few studies have appropriately induced hyperthermia and dehydration, and then

    clamped these states during the cognitive challenge. Many investigators have used physical

    exercise to induce these states, yet exercise may independently affect cognitive performance.

    Furthermore, task difficulty has rarely been controlled across cognitive functions, with the

    difficulty level for many tasks being too low, whilst inter-task comparisons have often been

    performed across different levels of difficulty. The former introduces bias, such that only

    performance decrements can be observed, whilst the latter renders it almost impossible to

    compare either the baseline data or subsequent changes in cognitive performance during altered

    thermal and hydration states. As a consequence of these limitations, our understanding of the

    affects of these stresses upon cognitive performance is less than optimal, and this study was

    designed to address these design limitations.

Authors


  •   van den Heuvel, Anne (external author)
  •   Croft, Rodney J.
  •   Haberley, Benjamin (external author)
  •   Hoyle, David (external author)
  •   Taylor, Nigel A.S.. (external author)

Publication Date


  • 2013

Citation


  • van den Heuvel, A. M. J., Croft, R. J., Haberley, B. J., Hoyle, D. J. R. & Taylor, N. A.S. The affects of heat strain and dehydration on cognitive function. In: Cotter, J. D., Lucas, S. JE. & Mündel, T. editors. Proceedings of the 15th International Conference on Environmental Ergonomics; New Zealand: International Society for Environmental Ergonomics; 2013. 72-74.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1827&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/814

Start Page


  • 72

End Page


  • 74

Place Of Publication


  • New Zealand