Neural effect of physical fatigue on mental fatigue: a magnetoencephalography study.
Neural effect of physical fatigue on mental fatigue: a magnetoencephalography study.
复制标题
身体疲劳对精神疲劳的神经影响：脑磁图研究。
DOI：
10.1080/21641846.2016.1167471
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Y.
中科院分区：
文献类型：
--
作者：
Tanaka;M.;Ishii;A.;Watanabe;Y.
背景精神疲劳表现为认知工作效率降低，已成为事故的重要原因。利用高时间分辨率和高空间分辨率的脑磁图和经典的条件反射技术，研究体力疲劳和脑力疲劳之间的神经关系。在第一个实验日，参与者进行了30 分钟的疲劳诱发心理任务测试。在试验开始后，节拍器的声音被用作条件刺激，而心理任务试验被用作诱发精神疲劳的非条件刺激。第二天，在闭眼状态下记录脑磁图，节拍器声音持续3 分钟(控制组)和10min疲劳性体力作业后。结果在左侧尾状核中，与对照组相比，在身体疲劳阶段，阿尔法波段功率降低。在疲劳诱发的体力作业过程中，功率降低的幅度与主观动机水平呈正相关。结论体力疲劳通过增加动机来补偿疲劳的影响，从而抑制左侧尾状核的活动。
BackgroundMental fatigue manifests as a reduced efficiency of cognitive workload and has become a significant cause of accidents. It is important to clarify the neural relationships between physical fatigue and mental fatigue.PurposeWe sought to clarify the neural effect of physical fatigue on mental fatigue using magnetoencephalography (MEG), with high temporal resolution and relatively high spatial resolution and classical conditioning techniques.MethodsFourteen right-handed volunteers participated in this study. On the first experimental day, participants performed fatigue-inducing mental task trials for 30 min. Metronome sounds, started just after the beginning of the trials, were used as conditioned stimuli and the mental task trials were used as unconditioned stimuli to induce mental fatigue. On the next day, MEG was recorded under an eyes-closed condition with the metronome sounds for 3 min just before (control session) and after a 10-min fatigue-inducing physical task session. Subjective fatigue and motivation were rated on visual analogue scales.ResultsIn the left caudate, decreased alpha-band power in the physical fatigue session relative to the control session was found. The magnitude of the reduced power was positively associated with subjective level of motivation during the fatigue-inducing physical task session.ConclusionThese results suggest that physical fatigue suppressed activity in the left caudate via increased motivation to compensate for the effects of fatigue.