Fast temporal interactions in human auditory cortex
Fast temporal interactions in human auditory cortex
复制标题
人类听觉皮层的快速时间相互作用
作者：
A. Rupp;Sebastian Hack;A. Gutschalk;Peter Schneider;T. Picton;C. Stippich;M. Scherg
本文用中潜伏期诱发场研究了人初级听觉皮层（AC）的时间分辨力。具有相同或不同频谱特征的成对声音呈现为声音之间的间隙为1，4，8和14 ms。时空模拟显示：（1）对第二个声音的响应在间隙为1 ms时是可识别的，并且随着间隙持续时间的增加，振幅迅速增加，（2）在间隙> 4 ms时，N40 m振幅增强，（3）不同刺激时N19 m-P30 m潜伏期延迟。相同刺激和不同刺激的中位心理声学阈值分别为1.6 ms和2.5 ms，证实了人类初级听觉皮层快速模式特异性时间处理的电生理证据。
The temporal resolution of the human primary auditory cortex (AC) was studied using middle-latency evoked fields. Paired sounds with either the same or different spectral characteristics were presented with gaps between the sounds of 1, 4, 8 and 14 ms. Spatio-temporal modelling showed (1) that the response to the second sound was recognizable with gaps of 1 ms and rapidly increased in amplitude with increasing gap durations, (2) an enhanced N40m amplitude at gaps > 4 ms, (3) delayed N19m-P30m latencies when the stimuli were different. The median psychoacoustical thresholds were 1.6 ms for the same stimuli and 2.5 ms for different stimuli, confirming the electrophysiological evidence for rapid pattern-specific temporal processing in human primary auditory cortex.