| 极低频磁场刺激对模拟失重条件下选择心算脑反应的影响 |
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| 引用本文： | 赵仑,魏金河,严拱东,陈文娟,段然,任维.极低频磁场刺激对模拟失重条件下选择心算脑反应的影响[J].航天医学与医学工程,1999,12(3):161-164. |
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| 作者姓名： | 赵仑 魏金河 严拱东 陈文娟 段然 任维 |
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| 作者单位： | 航天医学工程研究所,北京,100094 |
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| 摘 要： | 目的探讨极低频磁场（ＥＬＭＦ）在航天医学中的可能应用价值。方法在４０名２０～２５岁健康男性青年中，比较了头低位－１０°（ＨＤＴ）模拟失重条件下５Ｈｚ的ＥＬＭＦ刺激前后选择心算事件关联电位（ＥＲＰｓ）的变化。结果对照组ＥＲＰｓ中的正慢电位（主要位于后脑区）随头低位时间的延长，幅值呈现进行性下降趋势；ＥＬＭＦ组在ＥＬＭＦ刺激前后此正慢电位未出现明显的下降趋势，表明ＥＬＭＦ刺激抑制了模拟失重期间选择心算ＥＲＰｓ中正慢电位的下降。此正慢电位可能反映了一种集中注意对信号进行分析处理的主动脑抑制过程。结论所用的ＥＬＭＦ刺激在一定程度上可以改善模拟失重条件下的脑功能状态
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| 关 键 词： | 磁场 磁效应 事件关联电位 模拟失重 |
| 文章编号： | 1002-0837(1999)03-0161-04 |
| 修稿时间： | 1998-06-11 |
Effect of Extremely Low Frequency Magnetic Field on Brain Response to Selective Mental Arithmetic under Simulated Weightlessness |
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| ZHAO Lun,WEI Jin-he,YAN Gong-dong,CHEN Wen-juan,DUAN Ran,REN Wei.Effect of Extremely Low Frequency Magnetic Field on Brain Response to Selective Mental Arithmetic under Simulated Weightlessness[J].Space Medicine & Medical Engineering,1999,12(3):161-164. |
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| Authors: | ZHAO Lun WEI Jin-he YAN Gong-dong CHEN Wen-juan DUAN Ran REN Wei |
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| Institution: | Institute of Space Medico-Engineering, Beijing 100094, China. |
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| Abstract: | Objective To study effects of extremely low
frequency magnetic field (ELMF) on brain function state during weightlessness. Method BZThe
brain eventrelated potentials (ERPs) during a selective mental arithmetic task were compared in
40 normal subjects (2025 yrs) before and after ELMF (5 Hz) stimulation during simulated
weightlessness(head down tilt -10,HDT). Result The amplitude of slow positive potentials
which were supposed to be related to the mental arithmetic activity decreased significantly
especially in 100 min after HDT, but it did not decrease significantly after ELMF stimulation.
Conclusion ELMF stimulation may improve the brain function state during simulated
weightlessness. |
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| Keywords: | magnetic field magnetic effect eventrelated potentials simulated weightlessness |
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