2 AUDITORY COMPONENTS IN THE 130-230-MS RANGE DISCLOSED BY THEIR STIMULUS FREQUENCY-DEPENDENCE

被引：28

作者：

VERKINDT, C

BERTRAND, O

THEVENET, M

PERNIER, J

机构：

[1] Brain signals and processes laboratory, INSERM U280, Lyon, 69003

来源：

NEUROREPORT | 1994年 / 5卷 / 10期

关键词：

AUDITORY CORTEX; AUDITORY EVOKED POTENTIAL; P WAVE; SCALP CURRENT DENSITY; FREQUENCY DEPENDENCE;

D O I：

10.1097/00001756-199406020-00007

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

THE auditory P2 wave has been studied by means of scalp potential and scalp current density (SCD) mapping. Two components were described. One, peaking around 150 ms, probably reflects a major activity in both supra temporal planes as revealed by SCD maps (P150). The other is a bilateral temporo-parietal component peaking around 220 ms (P220). These two components were functionally disclosed by their stimulus frequency dependence. The P150 potential and SCD amplitudes significantly decrease with increasing frequencies. Whereas this could be interpreted as a modulation of the neural activity, it may also be related to a tonotopical organization of the underlying generators distinct from that previously found for the N100. No frequency effect was found on P220.

引用

页码：1189 / 1192

页数：4

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