持续性+Gz作用对清醒家兔脑干听觉诱发电位的影响  

Effects of Sustained +Gz Stress on BAEP in Waked Rabbits

作　　者：周云龙[1] 刘光远[1] 

机构地区：[1]航天医学工程研究所

出　　处：《航天医学与医学工程》1990年第1期22-26,共5页Space Medicine & Medical Engineering

摘　　要：本实验分析测量了不同G 值怍用条件下清醒家兔的脑干听觉诱发电位(BAEP),结果发现较低值的+Gz 作用对BAEP 潜伏期无明显影响5、6、7G 作用可使BAEP 1波峰潜期显著延长,而1～5波峰间潜期相对稳定。+Gz 作用对BAEP 各波幅值和频域特性有一定程度的影响。其影响机制可能与+Gz 作用引起的头水平血流减少和异常外周传入增加有关。实验结果可为超重条件下的工效学研究提供有益的参考。Brain-stem auditory evoked potentials (BAEP) in waked rabittswere observed during different levels of +Gz Stress.The resultsshowed that there was no obvious effect at lower G stresses onthe latencies of BAEP.The latency of BAEP wave 1 delayed signifi-cantly during +5,+6 and +7 Gz stresses,but the interwave latency(1-5) remained essentially unchanged The amplitude and frequencycharacteristics of BAEP were influenced to a certain extent.Theeffects of sustained +Gz stress on BAEP might be related to thehemodynamic changes at brain level and the unique peripherocep-tive stimuli during G stress.The results may provide reference forperformance studies during G stresses.

关 键 词：加速度 持续性 兔 脑干 诱发电位 

分 类 号：R852.21[医药卫生—航空、航天与航海医学]