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首页> 外文期刊>Aviation, space, and environmental medicine. >Postural activity and visual vigilance performance during rough seas.
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Postural activity and visual vigilance performance during rough seas.

机译：汹涌的大海中的姿势活动和视觉警惕性表现。

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BACKGROUND: Motion of a ship at sea often challenges crew performance. In previous studies, the influence of rough weather on stance at sea has been evaluated in terms of the likelihood of staggers or falls. Few studies have evaluated the influence of sea state on visual performance. Effects of rough seas on visual vigilance performance, subjective mental workload, and the kinematics of postural control have not been demonstrated. METHOD: Crewmembers of the R/V Thomas G. Thompson stood on a force plate, from which we obtained data on the center of pressure (COP). We varied stance width (the distance between the feet in side-by-side stance; 5 cm, 17 cm, and 30 cm) and the difficulty of visual vigilance tasks (Easy vs. Hard). Separately, we evaluated subjects' self-selected foot positioning. RESULTS: Visual performance was better on the Easy task (mean d' = 4.20) than on the Hard task (mean d' = 3.57). Overall vigilance performance (mean d' = 3.88) was worse than when the same subjects were tested under mild sea states (mean d' = 4.11). Subjective mental workload (mean = 28.0) was greater than under mild sea states (mean = 19.9). Relative to mild sea states the variability of postural activity was greater and its predictability was reduced. In addition, postural dynamics were influenced by controlled variations in stance width. CONCLUSIONS: Rough seas affect visual vigilance performance and postural activity, but do not eliminate the effects of vigilance task difficulty or stance width that have been found in mild seas.
机译：背景：船舶在海上的运动通常会挑战船员的表现。在先前的研究中，已经根据交错或跌倒的可能性评估了恶劣天气对海上姿态的影响。很少有研究评估海况对视觉性能的影响。尚未证明波涛汹涌的海面对视觉警惕性能，主观心理负荷和姿势控制运动学的影响。方法：R / V托马斯·汤普森（R.V. Thompson）的乘员站在一个测力板上，从中我们获得了压力中心（COP）的数据。我们改变了姿势宽度（并排姿势中脚之间的距离; 5 cm，17 cm和30 cm）和视觉警戒任务的难度（容易与困难）。另外，我们评估了受试者的自选足部位置。结果：Easy任务（均值d'= 4.20）比Hard任务（均值d'= 3.57）更好。总体警惕性表现（平均值d'= 3.88）比在轻度海况下对同一受试者进行测试时（平均值d'= 4.11）差。主观的精神工作量（平均= 28.0）大于轻度海况下的平均（平均= 19.9）。相对于轻度海况，姿势活动的可变性更大，而其可预测性则降低。此外，姿势动力学受姿势宽度受控变化的影响。结论：汹涌的海面影响视觉警戒性能和姿势活动，但不能消除在轻度海中发现的警戒任务难度或姿态宽度的影响。

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