Ball Aerospace at Wright-Patterson Air Force Base, OH, United States of America.
Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, United States of America.
Int J Psychophysiol. 2024 Apr;198:112323. doi: 10.1016/j.ijpsycho.2024.112323. Epub 2024 Feb 28.
Research has shown multiscale entropy, brain signal behavior across time scales, to reliably increase at lower time scales with time-on-task fatigue. However, multiscale entropy has not been examined in short vigilance tasks (i.e., ≤ 10 min). Addressing this gap, we examine multiscale entropy during a 10-minute Psychomotor Vigilance Test (PVT). Thirty-four participants provided neural data while completing the PVT. We compared the first 2 min of the task to the 7th and 8th minutes to avoid end-spurt effects. Results suggested increased multiscale entropy at lower time scales later compared to earlier in the task, suggesting multiscale entropy is a strong marker of time-on-task fatigue onset during short vigils. Separate analyses for Fast and Slow performers reveal differential entropy patterns, particularly over visual cortices. Here, observed brain-behavior linkage between entropy and reaction time for slow performers suggests that entropy assays over sensory cortices might have predictive value for fatigue onset or shifts from on- to off-task states.
研究表明，随着任务时间疲劳的增加，多尺度熵（大脑信号在时间尺度上的跨尺度行为）可靠地在较低时间尺度上增加。然而，多尺度熵尚未在短时间警戒任务（即≤10 分钟）中进行检查。为了解决这一差距，我们在 10 分钟的精神运动警戒测试（PVT）期间检查多尺度熵。34 名参与者在完成 PVT 时提供了神经数据。我们将任务的前 2 分钟与第 7 分钟和第 8 分钟进行比较，以避免末端冲刺效应。结果表明，与任务早期相比，后期较低时间尺度上的多尺度熵增加，表明多尺度熵是短时间警戒时任务时间疲劳开始的有力标志物。快速和慢速执行者的单独分析揭示了不同的熵模式，特别是在视觉皮层上。在这里，对于慢速执行者，观察到熵和反应时间之间的大脑-行为联系表明，对感觉皮层的熵测定可能对疲劳发作或从任务状态到离线状态的转变具有预测价值。
