Activation of duration-sensitive auditory cortical fields in humans
Activation of duration-sensitive auditory cortical fields in humans
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DOI：
10.1016/s0168-5597(97)00057-9
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发表时间：
1997-11-01
期刊：
影响因子：
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通讯作者：
Covarrubias, D
中科院分区：
文献类型：
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作者：
Alain, C;Woods, DL;Covarrubias, D
在听觉选择性注意任务中，研究了刺激持续时间对听觉诱发电位（AEPs）的影响。刺激持续时间效应通过从相同位置、频率和上升时间的aep到较长持续时间的音调中减去短持续时间的aep作为持续时间差波分离出来。分析表明，随着信号持续时间的增加，AEP分量的振幅增加，延迟时间减少，低频音调的时间整合时间更长。不同N1子分量的时间积分函数不同。结果表明，不同的听觉皮层区域具有不同的时间整合时间，并且这些功能随音调频率的变化而变化。(C) 1997爱思唯尔科学爱尔兰有限公司
The influence of stimulus duration on auditory evoked potentials (AEPs) was examined for tones varying randomly in duration, location, and frequency in an auditory selective attention task. Stimulus duration effects were isolated as duration difference waves by subtracting AEPs to short duration tones from AEPs to longer duration tones of identical location, frequency and rise time. This analysis revealed that AEP components generally increased in amplitude and decreased in latency with increments in signal duration, with evidence of longer temporal integration times for lower frequency tones. Different temporal integration functions were seen for different N1 subcomponents. The results suggest that different auditory cortical areas have different temporal integration times, and that these functions vary as a function of tone frequency. (C) 1997 Elsevier Science Ireland Ltd.