Cognitive task performance causes impaired maximum force production in human hand flexor muscles
Cognitive task performance causes impaired maximum force production in human hand flexor muscles
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DOI：
10.1016/j.biopsycho.2011.10.008
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发表时间：
2012-01-01
影响因子：
2.6
通讯作者：
Hicks, Audrey L.
中科院分区：
文献类型：
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作者：
Bray, Steven R.;Graham, Jeffrey D.;Hicks, Audrey L.
本研究的目的是调查高要求的认知任务表现对间歇性最大随意肌收缩（MVC）力产生的影响。参与者执行修改后的 Stroop 任务或控制任务 22 分钟。第一分钟后以及此后每隔 3 分钟，参与者评估疲劳程度、感知脑力消耗并进行 4 秒 MVC 手柄挤压。混合方差分析显示出显着的交互作用，F(7, 259) = 2.43，p=.02，在认知耗竭条件下，MVC 力产生随时间显着线性减少 (p=.01)，而对照组没有变化。感知脑力消耗的评分 F(7, 252)=2.39，p < .05，反映了与对照组相比，认知耗竭条件下随着时间的推移，力产生结果具有更大的线性增加 (p < .001)。研究结果支持了当前的观点，即执行认知要求较高的任务会减少中枢神经系统资源，而中枢神经系统资源负责管理需要最大程度自愿努力的体力任务的自我调节。 (C) 2011 Elsevier B.V. 保留所有权利。
The purpose of this study was to investigate effects of demanding cognitive task performance on intermittent maximum voluntary muscle contraction (MVC) force production. Participants performed either a modified Stroop or control task for 22 min. After the first min and at 3-min intervals thereafter, participants rated fatigue, perceived mental exertion and performed a 4-s MVC handgrip squeeze. A mixed ANOVA showed a significant interaction, F(7, 259) = 2.43, p=.02, with a significant linear reduction in MVC force production over time in the cognitively depleting condition (p=.01) and no change for controls. Ratings of perceived mental exertion, F(7, 252)=2.39, p < .05, mirrored the force production results with a greater linear increase over time in the cognitive depletion condition (p < .001) compared to controls. Findings support current views that performance of cognitively demanding tasks diminishes central nervous system resources that govern self-regulation of physical tasks requiring maximal voluntary effort. (C) 2011 Elsevier B.V. All rights reserved.