De Blasiis P, Caravaggi P, Fullin A, Leardini A, Lucariello A, Perna A, Guerra G, De Luca A
Department of Mental and Physical Health and Preventive Medicine, Section of Human Anatomy, University of Campania "Luigi Vanvitelli", Naples, Italy.
Movement Analysis Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.
Front Bioeng Biotechnol. 2023 Jul 20;11:1198120. doi: 10.3389/fbioe.2023.1198120. eCollection 2023.
The "postural control system" acts through biomechanical strategies and functional neuromuscular adaptations to maintain body balance under static and dynamic conditions. Postural stability and body weight distribution can be affected by external sensory inputs, such as different visual stimuli. Little information is available about the influence of visual receptors on stabilometric and plantar pressure parameters. The aim of this study was to analyze variability, correlations, and changes in these parameters under open- (OE) and closed-eye (CE) conditions. A total of 31 stabilometric and plantar pressure parameters were acquired in 20 young and healthy adults during baropodometric examination performed in bipedal standing under both visual conditions. Variability of parameters was evaluated via the coefficient of variation, correlation analysis via Pearson's R2, and statistical differences via the Wilcoxon test. High intra-subject repeatability was found for all plantar pressure parameters and CoP-speed (CV < 40%) under OE and CE conditions, while CoP-sway area (CoPsa) and length surface function (LSF) showed larger variability (CV > 50%). Mean and peak pressures at midfoot and total foot loads showed the least number of significant correlations with other parameters under both visual conditions, whereas the arch-index and rearfoot loads showed the largest number of significant correlations. The limb side significantly affected most plantar pressure parameters. A trend of larger LSF and lower CoPsa and mean and peak pressures at the right forefoot was found under the CE condition. The present study provides a deeper insight into the associations between postural stability and foot load. Interesting postural adaptations, particularly with respect to different visual stimuli, the effect of the dominant side, and the specific role of the midfoot in balance control were highlighted.
“姿势控制系统”通过生物力学策略和功能性神经肌肉适应机制发挥作用，以在静态和动态条件下维持身体平衡。姿势稳定性和体重分布会受到外部感觉输入的影响，例如不同的视觉刺激。关于视觉感受器对稳定测量和足底压力参数的影响，目前所知甚少。本研究的目的是分析在睁眼（OE）和闭眼（CE）条件下这些参数的变异性、相关性和变化情况。在两种视觉条件下，对20名年轻健康成年人进行双足站立的压力测量检查时，共获取了31个稳定测量和足底压力参数。通过变异系数评估参数的变异性，通过Pearson's R2进行相关性分析，通过Wilcoxon检验分析统计差异。在OE和CE条件下，所有足底压力参数和中心压力速度（CV < 40%）均具有较高的受试者内重复性，而中心压力摆动面积（CoPsa）和长度表面函数（LSF）显示出较大的变异性（CV > 50%）。在两种视觉条件下，中足和全足负荷的平均压力和峰值压力与其他参数的显著相关性最少，而足弓指数和后足负荷的显著相关性最多。肢体侧对大多数足底压力参数有显著影响。在CE条件下，发现右侧前足的LSF较大，CoPsa以及平均压力和峰值压力较低的趋势。本研究为姿势稳定性与足部负荷之间的关联提供了更深入的见解。突出了有趣的姿势适应性，特别是关于不同视觉刺激、优势侧的影响以及中足在平衡控制中的特定作用。
