摘要
背景:老年人由于轻度认知障碍而引起姿势控制能力下降,导致跌倒风险增高。双任务是在接近真实生活场景下评估认知与姿势控制能力关系的主要研究范式,站立时足底压力中心位移样本熵可代表姿势控制的复杂程度。目的:基于压力中心位移样本熵分析轻度认知障碍老年人与认知正常老年人在姿势控制-空间工作记忆任务中姿势稳定性特征及控制策略的差异,探究认知功能损伤对站立姿势控制能力影响。方法:筛选出符合条件的16名轻度认知障碍老年人和17名认知正常老年人为研究对象,老年人分别完成5种测试任务,包括空间工作记忆、双脚平衡站立、Romberg站立、双脚平衡站立-空间工作记忆双任务、Romberg站立-空间工作记忆双任务,每个任务有效完成3次。使用Kistler三维测力台采集足底压力中心数据,测试指标包括认知行为学指标(认知得分与反应时长)、动力学指标(压力中心位移及样本熵)。结果与结论:①轻度认知障碍老年人在执行空间工作记忆任务时认知得分最大、反应时间最短,双脚平衡站立-空间工作记忆双任务居中,Romberg站立-空间工作记忆双任务认知得分最小、反应时长最长,任务间比较差异均有显著性意义(P<0.05);②与双脚平衡站立、Romberg站立任务相比,轻度认知障碍老年人在执行双任务时压力中心前后、内外方向位移显著更大,压力中心前后、内外方向位移样本熵值显著更小(P<0.05);③在空间工作记忆任务下,轻度认知障碍老年人与认知正常老年人的认知得分、反应时长差异均无显著性意义(P>0.05);在两种双任务下,与认知正常老年人相比,轻度认知障碍老年人的认知得分更小、反应时长更长(P<0.05),同时轻度认知障碍老年人压力中心前后、内外方向位移更大,压力中心前后、内外方向位移样本熵值更小(P<0.05);④结果表明:与认知正常老年人相比
BACKGROUND:The decreased postural control ability due to mild cognitive impairment in elderly people leads to the increased risk of falls.Dual-task is the primary research paradigm for evaluating the relationship between cognition and postural control in the scenes close to real life.The sample entropy of the plantar center of pressure(COP)displacement during standing can represent the complexity of postural control.OBJECTIVE:Based on the COP displacement sample entropy,to analyze the differences in postural stability characteristics and control strategies between older adults with mild cognitive impairment and cognitively normal older adults during the dual-task with postural control and spatial working memory,aiming to explore the impact of cognitive impairment on the postural control ability during standing.METHODS:Sixteen older adults with mild cognitive impairment and 17 cognitively normal older adults were eligible and selected for the study.They completed five test tasks,including spatial working memory,double-feet balance stance,Romberg stance,double-feet balance stance-spatial working memory dual-task,and Romberg stance-spatial working memory dual-task,with three valid completions of each task.The plantar COP data were collected by the Kistler 3D force platform.The indicators included cognitive behavior(cognitive score and reaction time)and kinematic indexes(COP displacement and sample entropy).RESULTS AND CONCLUSION:The older adults with mild cognitive impairment performed the spatial working memory task with the greatest cognitive score and the shortest reaction time,the double-feet balance stance-spatial working memory dual-task with moderate cognitive score and reaction time,and the Romberg stance-spatial working memory dual-task with the smallest cognitive score and the longest reaction time,where the differences were significant among the tasks(P<0.05).In the older adults with mild cognitive impairment,the anterior-posterior and medial-lateral COP displacements were significantly greater,and their
作者
张雨馨
于聪
张翠
丁建军
陈岩
Zhang Yuxin;Yu Cong;Zhang Cui;Ding Jianjun;Chen Yan(Shandong Sport University,Jinan 250102,Shandong Province,China;Shandong Sports Science Research Center,Jinan 250102,Shandong Province,China;College of Sports and Health,Shandong Sport University,Jinan 250102,Shandong Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2025年第8期1643-1649,共7页
Chinese Journal of Tissue Engineering Research
基金
国家自然科学基金项目(12102235),项目负责人:张翠
国家体育总局科技创新项目(23KJCX058),项目负责人:陈岩。
关键词
轻度认知障碍
老年人
空间工作记忆
姿势控制
双任务
样本熵
mild cognitive impairment
older adults
spatial working memory
postural control
dual-task
sample entropy
