caa a22 4500 445352833 CHVBK 20180317142850.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00221-010-2524-8 doi (NATIONALLICENCE)springer-10.1007/s00221-010-2524-8 The influences of time-of-day and sleep deprivation on postural control [Elektronische Daten] [Clement Bougard, Marie-Charlotte Lepelley, Damien Davenne] The aim of this study was to check the combined and/or dissociated influences of time-of-day and sleep deprivation on postural control. Twenty subjects participated in test sessions which took place at 6:00 am, 10:00 am, 2:00 pm and 6:00 pm either after a normal night's sleep or after a night of total sleep deprivation. Postural control was evaluated by COP surface area, LFS ratio and Romberg's index. The results showed that postural control fluctuates diurnally according to three different periods, pronounced by sleep deprivation: (1) at 6:00 am, there was no modification by sleep deprivation; (2) at 10:00 am and 2:00 pm, an interaction effect was observed for COP surface area and LFS ratio after sleep deprivation. Values of COP surface area were significantly higher (P<0.01) following the night of sleep deprivation than after the normal night's sleep (139.36±63.82mm2 vs. 221.72±137.13mm2 and 143.78±75.31mm2 vs. 228.65±125.09mm2, respectively); (3) at 6:00 pm, the LFS ratio was higher than during the two other periods (P<0.001) whereas COP surface area decreased to the level observed at 6:00 am. At this time-of-day, only the LFS ratio was significantly increased (P<0.05) by the night of sleep deprivation (0.89±0.14 vs. 1.03±0.30). This temporal evolution in postural control does not seem to be related to any deterioration in visual input as Romberg's index (150.09±97.91) was not modified, regardless of the test session. Springer-Verlag, 2010 Postural control nationallicence Sleep deprivation nationallicence Time-of-day nationallicence Bougard Clement INSERM, ERI27, Université de Caen, 14000, Caen, France aut Lepelley Marie-Charlotte ERT, RAPSODIE 2002, Université de Caen, 14000, Caen, France aut Davenne Damien INSERM, ERI27, Université de Caen, 14000, Caen, France aut Experimental Brain Research Springer-Verlag 209/1(2011-03-01), 109-115 0014-4819 209:1<109 2011 209 221 https://doi.org/10.1007/s00221-010-2524-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-010-2524-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bougard Clement INSERM, ERI27, Université de Caen, 14000, Caen, France aut NATIONALLICENCE 700 1- Lepelley Marie-Charlotte ERT, RAPSODIE 2002, Université de Caen, 14000, Caen, France aut NATIONALLICENCE 700 1- Davenne Damien INSERM, ERI27, Université de Caen, 14000, Caen, France aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 209/1(2011-03-01), 109-115 0014-4819 209:1<109 2011 209 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer