Foot cooling does not improve vigilance but may transiently reduce sleepiness

Journal of Sleep Research
Ryan P SixtusJames D Cotter

Abstract

Temperature of the skin (TSk ) and core (TC ) play key roles in sleep-wake regulation. The diurnal combination of low TSk and high TC facilitates alertness, whereas the transition to high TSk and low TC correlates with sleepiness. Sleepiness and deteriorating vigilance are induced with peripheral warming, whereas peripheral cooling appears to transiently improve vigilance in narcolepsy. This study aimed to test the hypothesis that foot cooling would maintain vigilance during extended wakefulness in healthy adults. Nine healthy young adult participants with habitually normal sleep completed three constant-routine trials in randomized crossover order. Trials began at 22:30 hours, and involved continuous mild foot cooling (30°C), moderate foot cooling (25°C) or no foot cooling, while undertaking six × 10-min Psychomotor Vigilance Tasks and seven × 7-min Karolinska Drowsiness Tasks, interspersed with questionnaires of sleepiness and thermal perceptions. Foot temperatures in control, mild and moderate cooling averaged 34.5 ± 0.5°C, 30.8 ± 0.2°C and 26.4 ± 0.1°C (all p < .01), while upper-limb temperatures remained stable (34-35°C) and TC declined (approximately -0.12°C per hr) regardless of trial (p = .84). Foot cooling did not impr...Continue Reading

References

Dec 1, 1978·The Journal of Physiology·J N MillsJ M Waterhouse
May 1, 1990·The International Journal of Neuroscience·T Akerstedt, M Gillberg
Apr 1, 1993·Electroencephalography and Clinical Neurophysiology·V HäkkinenH Eskola
Jan 1, 1993·Somatosensory & Motor Research·J D GreenspanS L McGillis
Sep 15, 1999·Nature·K KräuchiA Wirz-Justice
Dec 10, 1999·Journal of Sports Sciences·P C TerryL Keohane
Mar 11, 2000·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·K KräuchiA Wirz-Justice
Dec 24, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·John A CaldwellJ Lynn Caldwell
Jan 18, 2003·Sleep Medicine Reviews·Helen S. Driver, Sheila R. Taylor
Jun 26, 2003·Journal of Internal Medicine·T Akerstedt, P M Nilsson
May 11, 2004·Progress in Cardiovascular Nursing·Gonzalo G Alvarez, Najib T Ayas
Jan 29, 2005·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Roy J E M RaymannEus J W Van Someren
Jul 12, 2005·Pharmacology, Biochemistry, and Behavior·Monica L AndersenSergio Tufik
Oct 28, 2005·Nature·Clifford B SaperJun Lu
May 9, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Kosuke KaidaKenji Fukasawa
Oct 31, 2006·Physiology & Behavior·Roy J E M RaymannEus J W Van Someren
Dec 14, 2006·Sleep·Rolf FronczekEus J W Van Someren
Apr 11, 2007·Ergonomics·Stephen S CheungMatthew K Knox
Jan 15, 2008·Brain : a Journal of Neurology·Roy J E M RaymannEus J W Van Someren
Nov 4, 2011·Pflügers Archiv : European journal of physiology·Nico RomeijnEus J W Van Someren
Dec 14, 2011·Physiology & Behavior·L A ReynerJ A Horne
Apr 23, 2014·Journal of Sleep Research·Torbjörn AkerstedtGöran Kecklund
Jul 12, 2014·European Journal of Applied Physiology·Nigel A S TaylorJoanne N Caldwell
Jan 15, 2016·Journal of Sleep Research·Alexander A BorbélyTom Deboer

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