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。
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.
出处
《航天医学与医学工程》
CAS
CSCD
1999年第3期161-164,共4页
Space Medicine & Medical Engineering
关键词
磁场
事件关联电位
模拟失重
极低频
心算脑反应
magnetic field
magnetic effect
eventrelated potentials
simulated
weightlessness
