急性中度缺氧对注意广度及注意转移能力的影响

The effects of acute moderate hypoxia on human performance of attention span and attention shift

目的：研究急性中度缺氧对人的注意广度及注意转移能力的影响．方法：利用低压舱模拟３６００ｍ，４４００ｍ高度１ｈ．５０００ｍ高度３０ｍｉｎ缺氧暴露，考察１６名健康男性青年的注意广度和黑红数字测验综合绩效的变化．结果：与正常对照值相比较，３６００ｍ缺氧暴露１ｈ各测试指标有不同程度的下降但未达到显著水平（Ｐ＞０．０５）．４４００ｍ缺氧暴露时黑红数字测验的反应时明显延长（Ｐ＜０．０５），综合绩效仅为对照值的７４％（Ｐ＜０．０５），注意广度测验综合绩效已降至８８％（Ｐ＜０．０５）．５０００ｍ暴露时黑红数字和注意广度测验综合绩效进一步降低（Ｐ＜０．０１）．结论：急性中度缺氧对注意的广度及转移能力已产生影响，工效不能得到保证．

AIM: To investigate the effects of acute moderatehypoxia on human performance of attention. METHODS:One hour exposure to 300 m (control), 3600 m, 4400 m and30 min to 5000 m hypoxia were achieved by mean of hypobariccabin simulation, The performance of attention span andblack--red figure test were studied in 16 healthy young malesubjects. RESULTS: Compared with control group, althoughthe parameters were not significant statistically (P> 0. 05 ),the human performance of attention had a tendency to decrease after 1 h exposure to 3600 m. Exposure To 4400 m for1 h the mean reaction time of black--red figure test prolonged(p<0. 05), but the accuracy rate of two tests were not significantly decreased (P>0. 05 ). However the performance ofattention span and black--red figure test decreased to 74 % and88% (p<0. 05). The performance of two tests in 30 min exposure to 5000 m group was significantly lower than that ofcontrol group (P<0.01). CONCLUSION: The performanceof attention span and attention shift have been affected afterexposure to acute moderate hypoxia.