论文部分内容阅读
目的研究急性轻、中度缺氧暴露对人的心理运动及视觉反应时的影响。方法利用低压舱模拟30 0m (对照高度 )、2 80 0m、360 0m、440 0m高度缺氧暴露 1h ,考察了 1 8名健康男性青年被试者指叩测验、简单反应时和选择反应时的变化。结果血氧饱和度 (SaO2 )由地面对照值 98%分别降至 90 %、82 %和 74%。 2 80 0m缺氧暴露 1h心理运动绩效的各个参数并无显著改变 (P >0 .0 5)。 360 0m缺氧暴露时选择反应时的平均反应时明显延长 ,运动绩效下降 (P <0 .0 5) ,且随着高度的增加以上影响进一步加重 (P <0 .0 1 )。而简单反应时和指叩测验的绩效暴露于 440 0m时仍无显著改变 (P >0 .0 5)。结论本研究的结果提示 ,急性缺氧暴露于 2 80 0m高度 1h并未对心理运动产生严重影响 ,而暴露于 360 0m以上高度时会对选择反应时等复杂反应产生负面影响 ,且随着高度的增加而加重。
Objective To study the effects of acute and moderate hypoxic exposure on human psychomotor and visual response. Methods The hypoxia chamber was used to simulate the hypoxia exposure at 300 m (control level), 280 m, 360 m, and 440 m for 1 h. A total of 18 healthy male subjects were interviewed by finger test, simple reaction and selective reaction Variety. Results The oxygen saturation (SaO2) decreased from 98% to 90%, 82% and 74% respectively. There was no significant change in each parameter of 2 80 0m hypoxia exposure 1h psychomotor performance (P> 0.05). The average reaction time at 360 0m hypoxia exposure was significantly longer and the performance of exercise decreased (P <0. 05), and the effect was further aggravated with the increase of altitude (P <0.01). However, there was no significant change in the performance of simple reaction and finger test when exposed to 440 0 m (P> 0.05). Conclusions The results of this study suggest that acute hypoxia exposure at 1 h at 280 ° m did not have a significant effect on psychological motility and exposure to 360 ° m above height negatively affected complex responses such as selective response, Increase and increase.