Temporal characteristics of auditory sensory memory: Neuromagnetic evidence
Temporal characteristics of auditory sensory memory: Neuromagnetic evidence
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DOI：
10.1111/j.1469-8986.1997.tb02401.x
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发表时间：
1997-05-01
期刊：
影响因子：
3.7
通讯作者：
Loveless, N
中科院分区：
文献类型：
--
作者：
McEvoy, L;Levanen, S;Loveless, N
我们使用全头神经磁记录研究了N100 m的时间依赖性，N100 m是听觉诱发反应最突出的偏转。刺激以0.6-8.1 s的刺激间间隔（ISI）单独或成对呈现（成对中的音调间隔210 ms）。N100 m对单一刺激和对第一个音有类似的时间恢复功能，在ISI为6 s时达到平台。N100 m时，除ISI较短外，其余均小于第一声，ISI稳定在4s左右。源分析表明，N100 m在颞上平面上可分解为两个相距约1cm的源。后源的恢复功能不受刺激呈现的影响，而前源的。前区的活动似乎反映了时间整合的影响。我们将这些结果与听觉感官记忆联系起来。
We investigated the temporal dependencies of N100m, the most prominent deflection of the auditory evoked response, using whole-head neuromagnetic recordings. Stimuli were presented singly or in pairs (tones in the pair were separated by 210 ms) at interstimulus intervals (ISIs) of 0.6-8.1 s. N100m to single stimuli and to the first tone of the pair had similar temporal recovery functions, plateauing at ISIs of 6 s. N100m to the second tone in the pair, which was smaller than that to the first except with short ISIs, plateaued with ISIs of about 4 s. Source analysis revealed that the N100m could be decomposed into two sources separated by about 1 cm on the supratemporal plane. The recovery function of the posterior source was not affected by stimulus presentation, whereas that of the anterior source was. Activity in the anterior area appears to reflect the effects of temporal integration. We relate these results to auditory sensory memory.