Motor dual-task effect on gait and task of upper limbs in older adults under specific task prioritization: pilot study.
Motor dual-task effect on gait and task of upper limbs in older adults under specific task prioritization: pilot study.
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DOI：
10.1007/s40520-013-0014-0
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发表时间：
2013-04
影响因子：
4
通讯作者：
Verghese, Joe
中科院分区：
文献类型：
--
作者：
Oh-Park, Mooyeon;Holtzer, Roee;Mahoney, Jeannette;Wang, Cuiling;Raghavan, Preeti;Verghese, Joe
同时执行多项任务可能导致子任务的表现下降（双任务成本），特别是在老年人中。双任务过程中的子任务性能也受到任务优先级的影响。然而，目前还没有很好的研究表明，在运动双重任务中，老年人的子任务的表现是如何受到影响的，而年轻人则被要求优先处理一项任务。本研究旨在探讨在特定任务优先级指导下，老年人与年轻人在运动双任务过程中对子任务的双任务效应。16名独立的老年人和18名年轻人执行了两项单一任务（通常的行走，站着时尽可能稳定地拿着托盘）和两项双重任务（拿着托盘走路，注意保持托盘尽可能稳定- wtat，拿着托盘走路，注意走路-WTAW）。在四种情况下测量步态参数[步幅长度的速度和变异性（变异系数；CV）]和托盘的俯仰角（前后）和侧滚角（左右）。与单一任务相比，在WTAT期间，年轻人和老年人组都表现出步态速度降低（老年人β = -14.0，年轻人-34.3），步态变异性增加（老年人β = 0.19，年轻人0.51），托盘倾斜增加（老年人β =9.4，年轻人俯仰7.9；老年人β =8.8，年轻人滚动5.9）。老年人对托盘稳定性的双任务效应较高，但对步态的双任务效应较低。在WTAW期间，不同年龄组在托盘稳定性和步态表现方面的双任务效应没有差异。与年轻人相比，老年人在运动双任务中倾向于妥协涉及上肢的任务，即使被指示优先考虑这项任务而不是步态。这些发现可能会对老年人学习或重新学习复杂运动活动的训练策略产生影响。
Performing multiple tasks simultaneously may result in reduced performance of subtasks (dual-task cost) particularly among old individuals. Subtask performance during dual-tasking is also known to be affected by task prioritization. However, it has not been well studied how the performance of subtasks is affected during motor dual-task in old adults compared to young when instructed to prioritize one task over the other. This study aims to investigate the dual-task effect on subtasks during motor dual-tasking under specific instruction of task prioritization in old compared to young adults. Sixteen independent old and 18 young adults performed two single tasks (usual walking, holding a tray as steady as possible while standing) and two dual-tasks (walking while holding a tray focusing attention on keeping tray as steady as possible-WTAT, and walking while holding tray focusing attention on walking -WTAW). Gait parameters [velocity and variability (coefficient of variation; CV) of stride length] and the pitch (forward-backward) and roll (side-to-side) angles of the tray were measured during the four conditions. During the WTAT compared to single tasks, both young and old groups showed reduced gait velocity (β = -14.0 for old, -34.3 for young), increased gait variability (β = 0.19 for old, 0.51 for young), and increased tray tilt (β =9.4 for old, 7.9 for young in pitch; β =8.8 for old, 5.9 for young in roll). Higher proportion of older individuals showed higher dual-task effect on tray stability, but lower dual-task effect on gait compared to young individuals. During WTAW, there was no difference in dual-task effect between age groups in tray stability or gait performance. Compared to young, older adults tend to compromise the task involving upper limbs during motor dual-tasking even when instructed to prioritize this task over gait. These findings may have ramifications on developing training strategies to learn or relearn complex motor activities in seniors.
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影响因子：
6.7
作者：
Verghese, J;Katz, MJ;Lipton, RB
通讯作者：
Lipton, RB
DOI：
10.1016/j.apmr.2006.10.007
发表时间：
2007-01-01
影响因子：
4.3
作者：
Verghese, Joe;Kuslansky, Gail;Pahor, Marco
通讯作者：
Pahor, Marco
影响因子：
2.4
作者：
Bloem, BR;Valkenburg, VV;Willemsen, MD
通讯作者：
Willemsen, MD
影响因子：
1.6
作者：
EBERSBACH, G;DIMITRIJEVIC, MR;POEWE, W
通讯作者：
POEWE, W
DOI：
10.1111/j.1532-5415.1998.tb03813.x
发表时间：
1998-06-01
影响因子：
6.3
作者：
Lundin-Olsson, L;Nyberg, L;Gustafson, Y
通讯作者：
Gustafson, Y