在10分钟的警觉任务中,多层次
L Jack Rhodes1, Lorraine Borghetti2, Megan B Morris2
1Ball Aerospace at Wright-Patterson Air Force Base, OH, United States of America.
概括
多尺度可靠地检测疲劳在短期警任务. 大脑信号复杂性在精神运动警觉测试 (PVT) 后期增加,特别是在表现较慢的参与者中,这表明疲劳开始.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 复杂性科学 复杂性科学
背景情况:
- 多尺度 (MSE) 量化了跨时间尺度的大脑信号复杂性.
- 之前的研究链接在较低的时间尺度上增加了MSE与任务时间疲劳.
- 在短期警戒任务 (≤10分钟) 中没有评估MSE.
研究的目的:
- 在10分钟的精神运动警觉测试 (PVT) 中调查MSE变化.
- 确定MSE是否可以作为短期警任务中疲劳发作的标志物.
- 为了探索快速和缓慢的表现者之间的模式的差异.
主要方法:
- 34名参与者完成了10分钟的PVT,同时记录神经数据.
- 通过将前2分钟与PVT的第7分钟和第8分钟进行比较来分析MSE.
- 对于快速和缓慢的表现者进行了单独的分析.
主要成果:
- 在较低的时间尺度上,MSE从PVT的早期到后期阶段增加.
- 在快速和慢速表现者之间观察到模式的显著差异,特别是在视觉皮层.
- 在表现缓慢的人中发现了和反应时间之间的大脑行为联系.
结论:
- MSE是一种敏感的标志物,可用于检测即使在短时间的警任务中,也能检测到任务时疲劳的出现.
- 快速表现者与缓慢表现者的不同模式表明了疲劳的不同神经机制.
- 对感官皮层的度测量可以预测疲劳的出现或状态的变化 (从任务到非任务).
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