How cognitive loads modulate the postural control of older women with low back pain?
How cognitive loads modulate the postural control of older women with low back pain?
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DOI：
10.1186/s12877-021-02025-z
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发表时间：
2021-01-28
期刊：
影响因子：
4.1
通讯作者：
Zhang S
中科院分区：
文献类型：
--
作者：
Ge L;Yu Q;Wang C;Huang H;Li X;Zhang S;Zhang S
姿势控制能力是老年人跌倒的关键因素，尤其是患有下腰痛(LBP)的老年女性。姿势控制的认知参与随着年龄的增长而增加。然而，大多数学者在探讨认知对老年LBP患者姿势控制的影响时，没有考虑不同难度水平的认知负荷。本研究旨在探讨不同水平的认知负荷对老年女性腰背痛患者姿势控制的影响。这是一项横断面研究。将20例老年LBP患者纳入LBP组，20例无LBP病史的健康老年女性作为健康对照组。计算平衡参数以量化姿势控制。所有参与者都接受了平衡测试，这要求参与者在有或没有同时进行认知任务的情况下，在力量平台上保持稳定。平衡测试包括三种难度的姿势任务(睁眼闭眼单腿站立)和三种认知任务(无认知任务、听觉算术任务和连载7 S算术任务)。重复测量方差分析(3个姿势任务× 3个认知任务× 2组)检验不同认知任务水平对不同姿势条件下作业成绩的影响。与对照组相比，患有LBP的老年女性的姿势控制更差(反映在更大的压力中心(COP)参数上)，无论姿势或认知方面的困难。与单一任务相比，尽管认知任务的难度较低，但在双重任务中，LBP被试的COP参数更大。在控制组中，只有当认知任务的难度水平较高时，才会显示较大的COP参数。在双重任务中，摇摆面积/摇摆长度与跌倒次数之间存在显著的相关性。我们的发现揭示了认知负荷如何调节患有LBP的老年女性的姿势控制。与对照组相比，认知负荷对LBP老年女性的姿势控制表现出更多的干扰作用，这与跌倒有关。
The capacity of postural control is a key factor related to falling in older people, particularly in older women with low back pain (LBP). Cognitive involvement in postural control increases with age. However, most scholars have not considered different difficulty levels of cognitive loads when exploring the effects of cognition on postural control in older patients with LBP. The present study is to investigate how different levels of cognitive loads modulate postural control in older women with LBP. This was a cross-sectional study. Twenty older women with LBP were recruited into the LBP group, and 20 healthy older women without the history of LBP were recruited into the healthy control group. Balance parameters were computed to quantify postural control. All participants underwent the balance test, which required the participant to maintain stability during standing on a force platform with or without a concurrent cognitive task. The balance test included three levels of difficulties of posture tasks (eyes-open vs. eyes-closed vs. one-leg stance) and three cognitive tasks (without cognitive task vs. auditory arithmetic task vs. serial-7 s arithmetic task). A repeated-measure analysis of variance (3 postural tasks × 3 congnitive tasks× 2 groups) testing the effects of the different congnitive task levels on the performance in different postural conditions. Older women with LBP had worse postural control (as reflected by larger center of pressure (COP) parameters) than control group regardless of postural or cognitive difficulties. Compared with the single task, the COP parameters of participants with LBP were larger during dual tasks, even though the difficulty level of the cognitive task was low. Larger COP parameters were shown only if the difficulty level of the cognitive task was high in control group. Correlations between sway area/sway length and the number of falls were significant in dual tasks. Our findings shed light on how cognitive loads modulate postural control for older women with LBP. Compared with control group, cognitive loads showed more disturbing effects on postural control in older women with LBP, which was associated with falling.
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