Furtado Fabianne, Gonçalves Bruno da Silva B, Abranches Isabela Lopes Laguardia, Abrantes Ana Flávia, Forner-Cordero Arturo
Department of Mechatronics, Escola Politécnica, University of Sao Paulo, São Paulo, Brazil.
Federal Institute of Education, Science, and Technology of Southeast of Minas Gerais, Barbacena, Minas Gerais, Brazil.
PLoS One. 2016 Oct 12;11(10):e0163310. doi: 10.1371/journal.pone.0163310. eCollection 2016.
The lack of sleep, both in quality and quantity, is an increasing problem in modern society, often related to workload and stress. A number of studies have addressed the effects of acute (total) sleep deprivation on postural control. However, up to date, the effects of chronic sleep deficits, either in quantity or quality, have not been analyzed. Thirty healthy adults participated in the study that consisted of registering activity with a wrist actigraph for more than a week before performing a series of postural control tests. Sleep and circadian rhythm variables were correlated and the sum of activity of the least active 5-h period, L5, a rhythm variable, obtained the greater coefficient value with sleep quality variables (wake after sleep onset WASO and efficiency sleep). Cluster analysis was performed to classify subjects into two groups based on L5 (low and high). The balance tests scores used to asses postural control were measured using Biodex Balance System and were compared between the two groups with different sleep quality. The postural tests were divided into dynamic (platform tilt with eyes open, closed and cursor) and static (clinical test of sensory integration). The results showed that during the tests with eyes closed, the group with worse sleep quality had also worse postural control performance. Lack of vision impairs postural balance more deeply in subjects with chronic sleep inefficiency. Chronic poor sleep quality impairs postural control similarly to total sleep deprivation.
睡眠质量和数量的不足在现代社会中是一个日益严重的问题，这通常与工作量和压力有关。许多研究探讨了急性（完全）睡眠剥夺对姿势控制的影响。然而，迄今为止，尚未分析过慢性睡眠不足（无论是数量上还是质量上）的影响。30名健康成年人参与了这项研究，该研究包括在进行一系列姿势控制测试之前，使用手腕活动记录仪记录一周多的活动情况。睡眠和昼夜节律变量进行了相关性分析，最不活跃的5小时时段的活动总和L5（一个节律变量）与睡眠质量变量（睡眠后觉醒WASO和睡眠效率）的系数值最大。基于L5（低和高）进行聚类分析，将受试者分为两组。使用Biodex平衡系统测量用于评估姿势控制的平衡测试分数，并在两组睡眠质量不同的受试者之间进行比较。姿势测试分为动态（睁眼、闭眼和平视时平台倾斜）和静态（感觉统合临床测试）。结果表明，在闭眼测试期间，睡眠质量较差的组姿势控制表现也较差。在慢性睡眠效率低下的受试者中，缺乏视觉会更严重地损害姿势平衡。慢性睡眠质量差对姿势控制的损害与完全睡眠剥夺类似。
