Influence of age on postural sway during different dual-task conditions
Influence of age on postural sway during different dual-task conditions
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DOI：
10.3389/fnagi.2014.00271
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发表时间：
2014-10-22
影响因子：
4.8
通讯作者：
Ermolao, Andrea
中科院分区：
文献类型：
--
作者：
Bergamin, Marco;Gobbo, Stefano;Ermolao, Andrea
竞争性并行任务和姿势结果的双任务性能评估对老年病学家越来越重要，因为它与预测老年人跌倒风险有关。本研究的目的是评估在不同的双任务条件下，包括视觉（SMBT），言语（CBAT）和认知（MAT）的任务与标准的龙伯格的睁眼位置（OE）的姿势稳定性。此外，这些条件进行了调查，在一个年轻的成年人和一组老年健康受试者的样本，以检查类型的次要任务和年龄状态之间的潜在相互作用。为了在四种条件下比较这些组，应用了组内-组间混合模型ANOVA。因此，稳定性测量平台已被用于测量压力中心速度（CoPV），摇摆面积（SA），前后（AP）和内外侧（ML）振荡的姿势摇摆的程度。受试者内效应检验表明，不同的四种条件对CoPV（p < 0.001）、SA（p < 0.001）的静态平衡有影响。事后分析表明，CBAT任务导致CoPV上最差的平衡条件，导致的得分显著低于OE（-11.4%; p < 0.05），SMBT（-17.8%; p < 0.01）和MAT（-17.8%; p < 0.01）条件下;在OE中发现最大SA，并且其在统计学上大于SMBT（-27.0%; p < 0.01）和MAT（-23.1%; p < 0.01）。受试者间分析表明，老年受试者组的平衡控制普遍较低（CoPV p < 0.001，SA p < 0.002），而混合模型ANOVA未检测到任何参数的次要任务类型和组之间的任何交互作用（CoPV p = 0.154，SA p = 0.125）。在双任务评估的姿势摇摆也被发现随着年龄的增长而减少，但是，没有年龄和类型的次要tasks. Overall之间的相互作用，这些结果表明，次要任务的影响最大的摇摆路径的长度，测量姿势稳定性是一个简单的口头分配。
Dual-task performance assessments of competing parallel tasks and postural outcomes are growing in importance for geriatricians, as it is associated with predicting fall risk in older adults. This study aims to evaluate the postural stability during different dual-task conditions including visual (SMBT), verbal (CBAT) and cognitive (MAT) tasks in comparison with the standard Romberg's open eyes position (OE). Furthermore, these conditions were investigated in a sample of young adults and a group of older healthy subjects to examine a potential interaction between type of secondary task and age status. To compare these groups across the four conditions, a within-between mixed model ANOVA was applied. Thus, a stabilometric platform has been used to measure center of pressure velocity (CoPV), sway area (SA), antero-posterior (AP) and medio-lateral (ML) oscillations as extents of postural sway. Tests of within-subjects effects indicated that different four conditions influenced the static balance for CoPV (p < 0.001), SA (p < 0.001). Post-hoc analyses indicated that CBAT task induced the worst balance condition on CoPV and resulted in significantly worse scores than OE (-11.4%; p < 0.05), SMBT (-17.8%; p < 0.01) and MAT (-17.8%; p < 0.01) conditions; the largest SA was found in OE, and it was statistically larger than SMBT (-27.0%; p < 0.01) and MAT (-23.1%; p < 0.01). The between-subjects analysis indicated a general lower balance control in the group of elderly subjects (CoPV p < 0.001, SA p < 0.002), while, the mixed model ANOVA did not detect any interaction effect between types of secondary task and groups in any parameters (CoPV p = 0.154, SA p = 0.125). Postural sway during dual-task assessments was also found to decrease with advancing age, however, no interactions between aging and types of secondary tasks were found. Overall, these results indicated that the secondary task which most influenced the length of sway path, as measured by postural stability was a simple verbal assignment.