| 注意状态对事件相关电位的影响研究 |
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| 引用本文： | 解恒革,王晓红,王鲁宁.注意状态对事件相关电位的影响研究[J].中国心理卫生杂志,2002,16(2):94-95,111. |
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| 作者姓名： | 解恒革 王晓红 王鲁宁 |
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| 作者单位： | 解放军总医院南三科,100853 |
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| 基金项目： | 总装备部国防科技基金 (99J0 0 9 JB1 0 0 1 )，军队“九五”课题 (98M1 39)资助 |
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| 摘 要： | 目的：研究不同注意状态下事件相关电位的变化特点。方法：智能正常年轻人18例，采用oddball模式，非靶刺激为80％的750Hz低频短音，靶刺激为20％的2000Hz高频短音。利用Nicolet Pathfinder Ⅱ型诱发电位仪，记录主动分辨靶刺激时，计数／不计数状态下事件相关电位各波潜伏期和P3波幅的变化。结果：与计数靶刺激时比，在不计数时P3波幅显著降低（P＜0．01），P3潜伏期及其余各波潜伏期变化无显著性意义。结论：P300波幅与注意密切相关，P3潜伏期不易受被试注意力的影响，是一个稳定的测量认知功能的指标。
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| 关 键 词： | P300 事件相关电位 注意状态 影响研究 |
Effect of Attentional Condition on Event-related Potentials |
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| Xie Hengge,Wang Xiaohong & Wang Luning.Effect of Attentional Condition on Event-related Potentials[J].Chinese Mental Health Journal,2002,16(2):94-95,111. |
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| Authors: | Xie Hengge Wang Xiaohong & Wang Luning |
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| Institution: | Xie Hengge,Wang Xiaohong & Wang Luning Department of Geriatric Neurology,15th ward,South Building,General Hospital of PLA,28 Fuxing Road,Beijing 100853 |
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| Abstract: | Objective: To study the effect of active attention with/without target counting on event-related potentials (ERPs) Method: ERPs were elicited by non-target (750 Hz, 80%) and target (2000 Hz, 20%) stimuli in an auditory oddball paradigm for 18 healthy young subjects Results:Compared to the active attention with target counting manner, P3 amplitude was significantly smaller when without target counting (P<0 01) No effect was found on the latencies of P3 and other waves Conclusion: P300 is closely related to attention The amplitude of P3 reflects the attentional resource allocation while the latency is relatively stable and not affected by subject's attentional conditions |
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| Keywords: | P300 event-related potential attention |
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