24小时头低位卧床对人体生理功能的影响  

NFLUENCE OF 24h HEAD-DOWN BED-REST ION PHYSIOLOGICAL FUNCTION OF HUMAN

作　　者：沈羡云[1] 黄华明[1] 陈士贵[1] 向求鲁[1] 孟京瑞[1] 

机构地区：[1]航天医学工程研究所

出　　处：《中国空间科学技术》1993年第5期66-70,F003,共6页Chinese Space Science and Technology

摘　　要：为了探讨航天飞行初期人体生理功能的变化及“空间适应性综合症”的机理,实验观察了12名受试者在头低位6°卧床期间心率、呼吸、体温和脑电的变化。实验中所有指标均同时记录在卧床实验室配套的生理测试处理系统上,并用此系统对各生理指标的变化进行计算机分析。分析结果表明头低位卧床中人体内的一些重要生理功能如心率、呼吸、脑电的昼夜节律仍存在,但出现一定的紊乱,表现在:①心率昼夜变化双峰波消失或模糊,时相推迟。②体温昼夜节律变化不明显;额部皮肤温度无明显的昼夜节律变化,腿部皮肤温度在卧床初期明显增加,之后波动较大。③卧床中脑电α波段功率谱值下降,而δ、θ波功率谱值上升。卧床中R-R 间期频谱分析和脑电功率谱分析的结果表明卧床中心脑的调节和皮层的兴奋性也发生一定变化。In order to observe the dynamic features of physiological functionof human body during the initial stage of space fligh and to study the mecha-nism of “space adaptation syndrom”,the heart rate,respiration,head and legbody surface temperatures and EEG were observed in 12 subjects during head-down 6°bed-rest.All the indices were recorded in a physiological data aquis-sition and processing system for out bed-rest laboratory.Analysis items includethe trend of heart rate,body temperatures,respiration and EEG during 24hbed-rest.R-R spectrum and EEG power spectrum.The results showed that some important physiological functions such asheart rate,respiration and EEG,were still remained circadian during head-down bed-rest,But some extent disorders were appeared,i.e.(1)The twohumps of heart rate rhythm which appear in normal condition were disappearedor indistinct,and the phase of heart rate rhythm was shift.(2)The circadianrhythm of body temprature was changed.The rhythem in head surface tempe-rature disappeared and the surface temperature in leg increased significantlyduring the intinial several hours,after then decreased,and the fluctuationwas remarkable.(3)The power in α band decreased and the power in δand θ band increased during bed-rest.The biorhythmic analysis indicated adecrease of circadian rhythm stability and showed a phase shifting.The resu-lts of R-R spectrum and and EEG power spectrum showed that the regulationof heart and brain and cerebral cortical activities were changed during 24hbedrest.

关 键 词：失重模拟 失重生理影响 实验 

分 类 号：R852.22[医药卫生—航空、航天与航海医学]