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首页> 外文期刊>Journal of Neurophysiology >Effect of dual tasking on intentional vs. reactive balance control in people with hemiparetic stroke
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Effect of dual tasking on intentional vs. reactive balance control in people with hemiparetic stroke

机译：双重任务对偏头痛患者中风与反应性平衡控制的影响

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摘要

To examine the effect of a cognitive task on intentional vs. reactive balance control in people with hemiparetic stroke (PwHS). Community-dwelling PwHS (n = 10) and healthy, age-similar controls performed two tests, which included the Limits of Stability Test (intentional control) and the Motor Control Test (reactive control), under single-task (ST) and dual-task (DT) conditions (addition of a cognitive task). Cognitive ability was measured on a word list generation task by recording the number of words enumerated in sitting (ST; for cognition) and during the balance tasks. The difference in response time between the ST and DT, defined as the "balance cost" was obtained [(ST - DT)/ST ?100] and compared between tests and across groups. The "cognitive cost" was similarly defined and compared. For both groups, the response time under DT condition was significantly greater for intentional than the reactive balance control task, leading to a higher balance cost for this task (P < 0.05). However, the cognitive cost was significantly greater for the intentional than the reactive balance control task for only the PwHS. DT significantly affected intentional than reactive balance control for PwHS. The significant decrease in both balance and cognitive performance under DT compared with ST conditions during intentional balance control suggests sharing of attentional resources between semantic memory and intentional balance control. Decreased performance on the cognitive task only during the reactive balance test indicates possible central nervous system's prioritization of reactive balance control over cognition.
机译：为了检查认知任务对偏瘫患者中意平衡反应平衡与反应平衡平衡的影响。居住在社区的PwHS（n = 10）和年龄相似的健康对照者进行了两项测试，包括稳定性限制测试（有意控制）和运动控制测试（反应性控制），在单任务（ST）和双重任务下进行任务（DT）条件（添加认知任务）。通过记录在坐（ST;用于认知）和平衡任务中列举的单词数，来测量单词列表生成任务的认知能力。获得ST和DT之间的响应时间差，定义为“平衡成本” [（ST-DT）/ ST？100]，并在测试之间和组之间进行比较。类似地定义并比较了“认知成本”。两组的DT条件下，有意的响应时间都比被动平衡控制任务长得多，导致该任务的平衡成本更高（P <0.05）。但是，有意识的认知成本明显高于仅针对PwHS的反应性平衡控制任务。 DT显着影响了PwHS的有意比无功平衡控制。与意向平衡控制期间的ST条件相比，DT下的平衡和认知表现均显着降低，这表明语义记忆和意向平衡控制之间的注意力资源共享。仅在反应性平衡测试过程中，认知任务的绩效下降表明中枢神经系统可能将反应性平衡控制的优先级高于认知。

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