咖啡因和蓝色丰富光对模拟太空远程操作期间备用视觉注意力的影响
Andrew M Liu1, Raquel C Galvan-Garza2, Erin E Flynn-Evans3,4,5
1Human Systems Laboratory, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA. amliu@mit.edu.
NPJ microgravity
|December 19, 2023
概括
咖啡因和蓝色丰富的光可以提高宇航员在睡眠剥夺期间分隔视觉注意力的能力. 在复杂的机器人手臂任务中,将两种对策结合起来是最有效的,以提高安全性.
科学领域:
- 太空作业太空作业
- 人类因素工程 人类因素工程
- 睡眠科学 睡眠科学
背景情况:
- 国际空间站 (ISS) 机器人手臂操作需要高度的认知功能.
- 慢性睡眠不足和昼夜不整可以损害宇航员的表现.
- 协调,空间推理和系统知识等任务属性容易受到睡眠障碍的影响.
研究的目的:
- 为了研究咖啡因和蓝色丰富光对telerobotic任务执行的影响.
- 评估这些对策对注意力分配的综合和单独影响.
- 为了确定这些干预措施是否可以减轻由于睡眠丧失而导致的绩效下降.
主要方法:
- 一个随机的,安慰剂控制的,交叉试验与16名参与者.
- 通过使用高保真桌面机器人手臂模拟器进行过夜测试.
- 低剂量咖啡因 (0.3 mg/kg/h) 和中等亮度的蓝色丰富白光 (~90 lux) 的使用.
- 评估主要机器人任务的性能和次要视觉任务的响应时间.
主要成果:
- 机器人任务性能在所有条件下保持一致.
- 咖啡因,单独和光,显著减少了次要任务的响应时间 (-9%至-13%).
- 仅蓝色增强光对响应时间的影响有限 (-4%至+2%).
- 光线和咖啡因的组合是最有效的干预措施.
结论:
- 咖啡因增强了睡眠受限个体视觉注意力分化的能力.
- 仅用蓝色丰富光线对提高注意力的有效性有限.
- 联合的光和咖啡因对策提供了最显著的好处.
- 这些干预措施可以提高宇航员在恶劣条件下或增加工作量时执行任务的安全边缘.
相关概念视频
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:15Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
01:24Color Vision
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
01:25Factors Affecting Perception
Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
An illustrative example of a perceptual set is the scenario where an airline pilot told...