摘要
目的观察头低位模拟失重对听觉事件关联电位 (ERPs)早成分的影响 ,进一步了解模拟失重条件下脑功能的变化特点。方法被试者为 1 4名右利手正常在校大学生 (2 0～ 2 3岁 )。以头低位倾斜 (- 1 0°,HDT)模拟失重 ,头高位倾斜 (+1 0°,HUT)为对照。要求被试者对 4个方位的声音信号进行音调选择方位区分反应 (SR)。在不同体位记录 4套SR作业的ERPs。对 -t和方差分析统计听觉ERPs早成分。结果与HUT相比 ,HDT条件下靶信号 (T)ERPs和非靶信号 (NT)ERPs早成分的平均幅值在第 4套作业时均显著降低 ,且以F5区受影响最大 ,并表现出一定的方位特征。结论HDT对听觉ERPs早成分有一定的抑制性影响 ,提示HDT下脑的警觉激活程度降低。
Objective To study changes of early components of the auditory ERPs during simulated weightlessness. Method The event related potentials (ERPs) during an auditory location discrimination were compared between head down tilt (HDT) and head up tilt (HUT) conditions in 14 normal subjects. Result The early components of T ERPs and NT ERPs decreased significantly during HDT as compared with that during HUT.The reduction of mean potential amplitude during HDT was more marked at left forehead area(F5). Conclusion These data provided further evidence showing that the early activity process of brain was also affected by simulated weightlessness.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2001年第6期395-399,共5页
Space Medicine & Medical Engineering
关键词
失重模拟
听觉
事件关联电位
脑功能
weightless simulation
auditory
event related potentials(ERPs)
early component
brain function
