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首页> 外文期刊>Journal of the International Neuropsychological Society: JINS >A Comparison of Mental Workload in Individuals with Transtibial and Transfemoral Lower Limb Loss during Dual-Task Walking under Varying Demand
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A Comparison of Mental Workload in Individuals with Transtibial and Transfemoral Lower Limb Loss during Dual-Task Walking under Varying Demand

机译：不同需求下双任任务中的特平和经罚金下肢损耗的心理工作量比较

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摘要

Objectives: This study aimed to evaluate the influence of lower limb loss (LL) on mental workload by assessing neurocognitive measures in individuals with unilateral transtibial (TT) versus those with transfemoral (TF) LL while dual-task walking under varying cognitive demand. Methods: Electroencephalography (EEG) was recorded as participants performed a task of varying cognitive demand while being seated or walking (i.e., varying physical demand). Results: The findings revealed both groups of participants (TT LL vs. TF LL) exhibited a similar EEG theta synchrony response as either the cognitive or the physical demand increased. Also, while individuals with TT LL maintained similar performance on the cognitive task during seated and walking conditions, those with TF LL exhibited performance decrements (slower response times) on the cognitive task during the walking in comparison to the seated conditions. Furthermore, those with TF LL neither exhibited regional differences in EEG low-alpha power while walking, nor EEG high-alpha desynchrony as a function of cognitive task difficulty while walking. This lack of alpha modulation coincided with no elevation of theta/alpha ratio power as a function of cognitive task difficulty in the TF LL group. Conclusions: This work suggests that both groups share some common but also different neurocognitive features during dual-task walking. Although all participants were able to recruit neural mechanisms critical for the maintenance of cognitive-motor performance under elevated cognitive or physical demands, the observed differences indicate that walking with a prosthesis, while concurrently performing a cognitive task, imposes additional cognitive demand in individuals with more proximal levels of amputation.
机译：目的：本研究旨在通过评估单侧串易（TT）与变粉（TF）LL的单侧抗体（TT）的神经认知措施来评估低肢体损失（LL）对心理工作量的影响，而在不同认知需求下行走的双任务行动。方法：脑电图（EEG）被记录为参与者在坐着或行走时执行了不同认知需求的任务（即，不同的物理需求）。结果：调查结果显示，两组参与者（TT LL与TF LL）表现出类似的EEGθ同步响应，因为认知或物理需求增加。此外，虽然具有TT LL的个体在坐着和步行条件期间对认知任务保持了类似的性能，但对于坐骑的条件，在步行期间，具有TF LL的绩效减少（慢响应时间较慢）。此外，对于在行走时行走的同时，eEG低alpha能力的区域差异也没有表现出eeg低alpha能力的区域差异，作为认知任务在行走时的函数。这种缺乏alpha调制恰逢TF LL组中的认知任务难度的函数没有θ/ alpha比力。结论：这项工作表明，两组在双任务步行期间共享一些常见但不同的神经认知功能。虽然所有参与者都能够在高架认知或物理需求下招募神经机制，以维持认知 - 电机性能，但观察到的差异表明，使用假肢行走，同时执行认知任务，对个人进行额外的认知需求截肢近期水平。

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