Stationary gaze entropy predicts lane departure events in sleep-deprived drivers.
Stationary gaze entropy predicts lane departure events in sleep-deprived drivers.
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DOI：
10.1038/s41598-018-20588-7
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发表时间：
2018-02-02
影响因子：
4.6
通讯作者：
Howard ME
中科院分区：
文献类型：
--
作者：
Shiferaw BA;Downey LA;Westlake J;Stevens B;Rajaratnam SMW;Berlowitz DJ;Swann P;Howard ME
与睡眠剥夺相关的性能下降是交通事故和死亡的主要原因。虽然目前的研究集中在眨眼参数作为驾驶员困倦的生理指标，但很少有人了解睡眠剥夺如何改变凝视行为。特别是，睡眠剥夺对凝视熵的影响以前没有被研究过。在这项随机重复测量研究中，9名（4名男性，5名女性）健康参与者在封闭的轨道上完成了两次驾驶（1次在睡眠剥夺后，1次在正常睡眠后），在此期间记录了眼动活动和车道偏离事件。睡眠剥夺后，注视频率降低，眨眼频率、持续时间和眼跳幅度增加。此外，静态和过渡的凝视熵也增加睡眠剥夺以及随着时间的推移。特别是静止凝视熵的增加与车道偏离事件发生的几率更高相关。这些结果强调了睡眠剥夺和任务时间效应引起的疲劳如何通过破坏凝视分布和扫描模式来损害驾驶员的视觉意识。
Performance decrement associated with sleep deprivation is a leading contributor to traffic accidents and fatalities. While current research has focused on eye blink parameters as physiological indicators of driver drowsiness, little is understood of how gaze behaviour alters as a result of sleep deprivation. In particular, the effect of sleep deprivation on gaze entropy has not been previously examined. In this randomised, repeated measures study, 9 (4 male, 5 female) healthy participants completed two driving sessions in a fully instrumented vehicle (1 after a night of sleep deprivation and 1 after normal sleep) on a closed track, during which eye movement activity and lane departure events were recorded. Following sleep deprivation, the rate of fixations reduced while blink rate and duration as well as saccade amplitude increased. In addition, stationary and transition entropy of gaze also increased following sleep deprivation as well as with amount of time driven. An increase in stationary gaze entropy in particular was associated with higher odds of a lane departure event occurrence. These results highlight how fatigue induced by sleep deprivation and time-on-task effects can impair drivers’ visual awareness through disruption of gaze distribution and scanning patterns.
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