| Gz重力作用下脑循环的改变 |
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| 引用本文： | 谢宝生,程学尧,薛月英,刘光远.Gz重力作用下脑循环的改变[J].中国应用生理学杂志,1985(3). |
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| 作者姓名： | 谢宝生 程学尧 薛月英 刘光远 |
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| 作者单位： | 航天医学工程研究所 北京
(谢宝生，程学尧，薛月英)，航天医学工程研究所 北京(刘光远) |
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| 摘 要： | 为了研究 Gz重力作用下脑循环的改变,10名被试者在半径为6米的人体离心机上承受了 G_Z超重作用。实验记录了心电、上臂血压、心振动图和脑阻抗图。发现,随着超重值的增加,心率、心输出量、上臂血压和外周循环阻力逐渐增大,计算得到的头部眼水平的平均动脉血压逐渐下降,脑阻抗图波高和波形发生明显改变。并对重要的生理指标和脑循环调节机制进行了分析和讨论。结果表明,尽管机体内存在许多补偿机制,但在G值较高时,由于不能完全代偿血液静水压效应的影响,脑循环还是可能发生明显的改变。
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| 关 键 词： | 脑阻抗图 静水压效应 |
CEREBRAL CIRCULATORY CHANGES UNDER Gz STRESS |
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| Xie Baosheng Cheng Xueyao Xue Yueying Liu Guangyuan.CEREBRAL CIRCULATORY CHANGES UNDER Gz STRESS[J].Chinese Journal of Applied Physiology,1985(3). |
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| Authors: | Xie Baosheng Cheng Xueyao Xue Yueying Liu Guangyuan |
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| Abstract: | In studying the cerebral circulatory changes under Gz stress, ten healthy young men(18-24 yrs.) were exposed to Gz stress on a human centrifuge with six meter radius. EEG,upper arm blood pressure, vibrocar-diogram and rheoencephalogram were recorded.lt was found that heart rate,upper arm blood pressure,cardiac output and periphery circulatory resistance increased,and amplitude and shape of rheoencephalogram chan- ged with the increase of Gz. Changes of some important physoijogical parameters and the regulatory mechanisms of cerebral circulation under Gz stress were analyzed and discussed. Results showed that in spite of existance of the various compensatory mechanisms, impairment of the cerebral circulation still occurred due to the hydrostatic effect of the blood column at higher G levels. |
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| Keywords: | rheoencephalogram hydrostatic effect of blood column |
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