Event-related brain potentials to attended and ignored olfactory and trigeminal stimuli
Event-related brain potentials to attended and ignored olfactory and trigeminal stimuli
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DOI：
10.1016/s0167-8760(00)00111-2
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发表时间：
2000-09-01
影响因子：
3
通讯作者：
Murphy, C
中科院分区：
文献类型：
--
作者：
Geisler, MW;Murphy, C
事件相关脑电位（ERPs）记录从26个年轻人，具有相同数量的男性和女性受试者，使用注意和忽略，嗅觉和三叉神经刺激。使用单刺激范例记录N1，P2和P3分量的振幅和潜伏期，刺激间隔为60 s，采用乙酸戊酯作为嗅觉刺激，氨作为三叉神经刺激。受试者估计刺激强度在出席条件下，或继续与视觉跟踪任务在忽略条件。结果表明，嗅觉信息的处理速度比三叉神经的信息快30-70毫秒的N1和P2电位和100毫秒的P3 ERP组件快。N1/P2峰间振幅大于三叉神经的嗅觉刺激，并在出席比忽略的条件下。注意条件下嗅觉信息加工的P3波幅大于忽略条件下的P3波幅，三叉神经信息加工的P3波幅与注意条件下的P3波幅相当。这些研究结果表明，神经元资源分配是最大的出席刺激和痛苦的刺激需要神经元资源，即使被忽视。(C)2000 Elsevier Science B. V.保留所有权利。
Event-related brain potentials (ERPs) were recorded from 26 young adults, with equal numbers of male and female subjects, using attended and ignored, olfactory and trigeminal stimuli. The amplitudes and latencies of the N1, P2, and P3 components were recorded using a single-stimulus paradigm, with an inter-stimulus interval of 60 s, employing amyl acetate as the olfactory stimulus and ammonia as the trigeminal stimulus. Subjects estimated stimulus intensity in the attend condition or continued with a visual tracking task in the ignore condition. Results indicate that olfactory information is processed 30-70 ms faster than trigeminal information for the N1 and P2 potential and 100 ms faster for the P3 ERP component. N1/P2 interpeak amplitude was greater for the trigeminal than the olfactory stimuli, and greater in the attended than ignored condition. P3 amplitude was greater in the attend than ignore condition for olfactory information processing and equivalent for trigeminal information processing. These findings suggest that neuronal resource allocation is greatest for attended stimuli and that a painful stimulus demands neuronal resources even when ignored. (C) 2000 Elsevier Science B.V. All rights reserved.