听觉空间方位区分作业中的两类脑慢电位反应

发布时间：2018-02-26 14:33

本文关键词： 听觉方位感知事件相关电位失重模拟　出处：《航天医学与医学工程》2002年04期 　论文类型：期刊论文

【摘要】：目的研究听觉方位区分ERPs的类型特征及其受模拟失重影响的差异。方法 1 4名右利手正常被试者。以头低位倾斜 ( - 1 0°,HDT)为模拟失重 ,头高位倾斜 ( + 1 0°,HUT)为对照。要求被试者对不同方位的声音信号进行音调选择方位区分 ,每种体位作 4套测试。记录 9导脑电。结果 1 )根据靶刺激ERPs的特点将被试者分成I类 (n =7)和II类 (n =7) ,其主要差异为II类被试者的ERPs出现显著的负慢电位 ( 1 5 0～ 75 0ms) ,行为指标亦表明II类被试者的错误率和反应时均高于I类 ,提示II类被试者的心理负荷比I类重 ;2 )II类ERPs受HDT条件影响的时间比I类更早 ,负向偏移更大 ,表明头低位模拟失重对II类ERPs的影响程度要大于I类。结论ERPs中的慢电位在一定程度上可以体现心理负荷和脑功能状态 ,在航天航空作业人员的选拔和训练中应注意听觉ERPs的特征及其承受心理负荷的状况。
[Abstract]:Objective to study the typological characteristics of auditory azimuth differentiation (ERPs) and its effects on simulated weightlessness. Methods 14 healthy subjects with right handedness were studied. Head-low tilt (-10 掳HDT) was used to simulate weightlessness. The head-high tilt (10 掳HUTs) was used as a control. Subjects were asked to select the azimuth of the tone of the sound signals in different positions. Results 1) according to the characteristics of target stimulation ERPs, the subjects were divided into two groups: class I (7) and class II (7). The main difference was that the negative slow potential (150 ~ 750ms) appeared in the ERPs of the class II subjects. The behavioral indexes also showed that the error rate and reaction time of the class II subjects were higher than those of the group I subjects. It was suggested that the psychological load of class II subjects was affected by HDT condition earlier and the negative deviation was greater than that of class I heavy type II ERPs. Conclusion the slow potential in ERPs can reflect psychological load and brain function to a certain extent, and the effect of head-low simulated weightlessness on class II ERPs is greater than that of class I.Conclusion slow potential in ERPs can reflect mental load and brain function to some extent. In the selection and training of aerospace operators, attention should be paid to the characteristics of auditory ERPs and its psychological load.
【作者单位】：航天医学工程研究所航天医学工程研究所航天医学工程研究所航天医学工程研究所济南军区物资供应站
【分类号】：R853

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