Mismatch negativity to pitch change:: varied stimulus proportions in controlling effects of neural refractoriness on human auditory event-related brain potentials
Mismatch negativity to pitch change:: varied stimulus proportions in controlling effects of neural refractoriness on human auditory event-related brain potentials
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DOI：
10.1016/s0304-3940(03)00408-7
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发表时间：
2003-06-26
影响因子：
2.5
通讯作者：
Winkler, I
中科院分区：
文献类型：
--
作者：
Jacobsen, T;Schröger, E;Winkler, I
基于记忆比较过程，重复声音的音高变化被预先注意到，并通过失配负性（MMN）事件相关脑电位（ERP）反映出来。在这种奇怪的序列中，ERP反应也受到频率特异性传入皮层神经元的不同难解状态的影响。MMN的这种污染可以使用附加的等概率音调阻塞序列来控制。本研究分别调查了这些控制音的顺序概率从10%到45%的变化效果。结果表明，所有控制序列音调的均匀分布并不需要有效地消除神经耐火性对erp的影响。真正的基于记忆比较的频率变化MMN可以使用序列来估计，其中等概率控制音调的数量在3到9之间变化。(C) 2003爱思唯尔科学爱尔兰有限公司版权所有。
Based on a memory-comparison process, changes in the pitch of repetitive sounds are pre-attentively detected, reflected by the mismatch negativity (MMN) event-related brain potential (ERP). In such oddball sequences, ERP responses are also affected by differential refractory states of frequency-specific afferent cortical neurons. This contamination of MMN can be controlled using an additional blocked sequence of equiprobable tones. The present study investigated effects of varying the in-sequence probabilities of these control tones from 10 to 45%, respectively. Results showed that an equal distribution of all control-sequence tones is not necessary for efficiently removing neural refractoriness effects on the ERPs. The genuine memory-comparison-based frequency-change MMN can be estimated using sequences, within which the number of equiprobable control tones varies between three and nine. (C) 2003 Elsevier Science Ireland Ltd. All rights reserved.