摘要
本文在地面模拟条件下分析了15名健康受试者(18～22岁)在地面对照态、急性缺氧态(吸含氧10.5%的氧氮混合气,相当于5000m高度急性缺氧)及吸氧恢复态的脑波静态频率自组织特征。实验结果发现,出现频率单调化及能量优势涨落集中于主频振荡成分,这是脑出现缺氧反应,进行自组织调整的重要特征,标志缺氧耐力开始下降。而出现多频率成分竞争,主频振荡频率慢化,能量优势涨落近似均匀分配在诸成分上,出现不稳定的自组织结构,是缺氧反应加重、缺氧耐力恶化、高空稳定性不好的标志。另外发现吸含氧10.5%的氧氮混合气,对轻度脑功能失调者有促进脑功能调整的作用。
The synergetic structure of α frequency components in EEG was studied in 15 normal healthy valunteers aged 18--22 years under normobaric hypoxic condition induced by inhalation of a hypoxic gas mixture(O_2, 10.5%; N_2, 89.5%; equivalent to 5000 m altitude) for 30min. The results showed that the synergetic structure of a frequency components in EEG under hypoxia could be identified for two stages; (1) Fluctuation of energy of α was converged on the main frequency component and the brain was self-organized in a new situation in order to adapt itself to hypoxia. (2) The main frequency component shifted to lower frequency and the energy fluctuation of a was almost equally distributed among principal components of a, which reflected that human tolerance to hypoxia declined.
出处
《航天医学与医学工程》
CAS
CSCD
1992年第4期245-249,共5页
Space Medicine & Medical Engineering
关键词
急性高空缺氧
脑电图
自组织系统
acute altitude hypoxia, electroencephalograms, fluctuation, self organizing systems
