•  
  •  
 

Abstract

The purpose of this study was to compare the effects of sleep deprivation and rest on postural control. It was hypothesized that significant increases in COP deviations will occur after sleep deprivation. Methods. Four healthy adults (age= 21.50 years; mass= 68.93 kg) participated in two protocols involving sleep and sleep-deprivation. Within each condition multiple 40s impairments of visual, somatosensory, and/or vestibular sensory feedback were performed. Balance was quantified using root-mean-square (RMS) of the centre of pressure (COP) and COP Variance. Results. Two-way ANOVA demonstrated no significant effect of sleep deprivation on balance between sensory insults. Paired t-tests were performed nonetheless and revealed significant differences within the sleep-deprived condition. COP RMS and Variance were significantly greater medio-laterally with all systems impaired (ALL) (3.43 ± 0.63 mm, p<0.05; and 4.6 ± 1.60 mm, p<0.05) than with all systems unimpaired (QS) (2.36 ± 0.24 and 2.1 ± 0.45). Also, COP RMS was significantly greater in the visual/vestibular-impairment condition (3.19 ± 0.63, p<0.05) than in QS. Antero-posteriorly, COP RMS and Variances were significantly greater in ALL (7.0 ± 9.40, p<0.05; 20.30 ± 9.39, p<0.05), compared to QS (4.39 ± 1.01 and 6.64 ± 2.73). These values were both significantly greater than measurements in visual-impairment (RMS= 4.43 ± 1.41, p<0.05; Variance=6.06 ± 1.81, p<0.05) and somatosensory-impairment (RMS=4.03 ± 7.71, p<0.05; Variance=5.80 ± 2.73, p<0.05). COP RMS was elevated significantly (p<0.05) above QS and somatosensory in the somatosensory/vestibular-impairment condition (8.51 ± 3.17, p<0.05). Conclusions. Sleep deprivation may affect balance control. These interpretations are supported with weak statistical evidence, and must be considered tentatively.

URL with Digital Object Identifier

http://dx.doi.org/10.5206/wurjhns.2010.1

Share

COinS