Human auditory middle latency responses: influence of stimulus type and intensity
Human auditory middle latency responses: influence of stimulus type and intensity
复制标题
DOI：
10.1016/s0378-5955(01)00292-1
复制
发表时间：
2001-08-01
期刊：
影响因子：
2.8
通讯作者：
Pantev, C
中科院分区：
文献类型：
--
作者：
Borgmann, C;Ross, B;Pantev, C
用脑磁图（MEG）和脑电图（EEG）记录了人对不同强度短声和短音刺激的听觉中潜伏期反应（MLR）。在dB感觉水平（SL）上，在相同强度下，短声比短音引起更大的反应和更短的潜伏期。大多数MLR幅度增加，他们的潜伏期下降，增加刺激强度为两种类型的刺激。在短声刺激的情况下，Pa和Nb振幅在60 dB SL的强度下饱和。咔嗒声诱发的MLR潜伏期较短，这可以通过其较短的上升时间和频谱的高频内容来解释。MEG源分析产生的MLR源，这是明显不同的皮层慢波N1。它们似乎位于沿着赫氏回的初级听觉区。(C)2001 Elsevier Science B.V.保留所有权利。
Human auditory middle latency responses (MLR) to click and tone pip stimuli of different intensities were recorded by means of magnetoencephalography (MEG) and electroencephalography (EEG). Clicks elicited larger responses with significantly shorter latencies than the tone pips at the same intensity in dB sensation level (SL). Most MLR amplitudes increased and their latencies decreased with increasing stimulus intensity for both types of stimulation. Pa and Nb amplitudes saturated at intensities of 60 dB SL in the case of click stimulation. The shorter latencies of MLR evoked by the click were explained by its short rise time and the high frequency content of its spectrum. MEG source analysis yielded MLR sources which were clearly different from those of the slow cortical wave N1. They seem to be located in primary auditory areas along Heschl's gyrus. (C) 2001 Elsevier Science B.V. All rights reserved.