Bibliographic Details
| Title: |
轻度认知障碍老人与认知正常老人在不同单双任务下姿势控制能力的差异性. |
| Alternate Title: |
Differences in postural control ability between older adults with mild cognitive impairment and those with normal cognition under different single-task and dual-task conditions. |
| Authors: |
张雨馨1, 于 聪1, 张 翠2, 丁建军1, 陈 岩3 |
| Source: |
Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu. 3/18/2025, Vol. 29 Issue 8, p1643-1649. 7p. |
| Subject Terms: |
*MILD cognitive impairment, *SHORT-term memory, *OLDER people, *SPATIAL memory, *COGNITION disorders |
| Abstract (English): |
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 sample entropy values were significantly smaller in the double-feet balance stance-spatial working memory dual-task and Romberg stance-spatial working memory dual-task than in the double-feet balance stance and Romberg stance tasks (P < 0.05). In the spatial working memory task, there were no significant differences in cognitive score and reaction time between the both groups (P > 0.05); however, in the double-feet balance stance-spatial working memory dual-task and Romberg stance-spatial working memory dual-task, cognitive scores were significantly smaller and reaction times were longer in the older adults with mild cognitive impairment compared with the cognitively normal older adults (P < 0.05). In the double-feet balance stance-spatial working memory dual-task and Romberg stance-spatial working memory dual-task, the older adults with mild cognitive impairment exhibited significantly greater anterior-posterior and medial-lateral COP displacements and significantly smaller sample entropy values compared with the cognitively normal older adults (P < 0.05). All findings indicate that compared with cognitively normal older adults, older adults with mild cognitive impairment exhibit smaller complexity, poorer systematic adaption and decreased automatic regulation of the postural control during performing the dual-tasks, who are more susceptible to spatial working memory interference, leading to the increased risk of falls. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
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, 轻度认知障碍老年人在执行双任务时姿势控制复杂度降低, 系统适应性较差, 自动调控能力下降, 更容易受到空间工作记忆干扰, 跌倒风 险增大. [ABSTRACT FROM AUTHOR] |
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