Volume 51, Issue 6 pp. 539-545
Original Article

Age-related decline in thermal adaptation capacities: An evoked potentials study

Jennifer Kemp

Corresponding Author

Jennifer Kemp

Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364, Université de Strasbourg, CNRS, Strasbourg, France

Address correspondence to: Jennifer Kemp, Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364, Université de Strasbourg, CNRS, 21 rue Becquerel, 67087 Strasbourg, France. E-mail: [email protected]Search for more papers by this author
Olivier Després

Olivier Després

Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364, Université de Strasbourg, CNRS, Strasbourg, France

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Thierry Pebayle

Thierry Pebayle

Centre d'Investigations Neurocognitives et Neurophysiologiques, UMS 3489, Université de Strasbourg, CNRS, Strasbourg, France

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André Dufour

André Dufour

Laboratoire de Neurosciences Cognitives et Adaptatives, UMR 7364, Université de Strasbourg, CNRS, Strasbourg, France

Centre d'Investigations Neurocognitives et Neurophysiologiques, UMS 3489, Université de Strasbourg, CNRS, Strasbourg, France

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First published: 24 February 2014
Citations: 4

Abstract

Aging is associated with changes in thermosensitivity and decreases in the functionality of the autonomic thermoregulation. The underlying mechanisms are, however, not fully understood. Elderly subjects may undergo functional changes in the integration process of the thermal sensory system, especially in their thermal adaptation capacities. To verify this hypothesis, we compared thermal evoked responses in younger and older subjects exposed to thermoneutral (27°C) and warm (30°C) environments. In the warm environment, the amplitudes of thermal evoked potentials (EPs) were significantly lower in older than in younger subjects, whereas in the thermoneutral environment, the EP amplitudes were similar in both groups. These findings suggest that thermal adaptation capacities are reduced in elderly individuals, due to a dysfunction of C-fibers with aging, particularly expressed by lowered adaptation capacities to temperature variations.

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