Phase-locked oscillatory ∼ 15-to 30-Hz response to transient visual contrast stimulation:: neuromagnetic evidence for cortical origin in humans

被引：15

作者：

Narici, L ^{[1
]}

Carozzo, S

Lopez, L

Ogliastro, C

Sannita, WG

机构：

[1] Aalto Univ, Low Temp Lab, Brain Res Unit, FIN-02150 Espoo, Finland

[2] Univ Roma Tor Vergata, Dept Phys, Rome, Italy

[3] Univ Genoa, Dept Motor Sci & Rehabil, Genoa, Italy

[4] Ctr Dev Disabil, Grottaferrata, Italy

[5] SUNY Stony Brook, Dept Psychiat & Behav Sci, Stony Brook, NY 11794 USA

来源：

NEUROIMAGE | 2003年 / 19卷 / 03期

关键词：

visual evoked responses; oscillatory responses; gamma-band activity; visual cortex; contrast stimulation; synchronized activation; neuromagnetic method; humans;

D O I：

10.1016/S1053-8119(03)00108-3

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

We present neuromagnetic evidence that the human oscillatory (-15-30 Hz; "gamma band") mass response to transient visual (contrast) stimulation originates from cortical areas also generating the conventional pattern-evoked response (VERs). The oscillatory response has shorter latency from stimulus and earlier temporal evolution than the VERs, with different orientation of the source currents. These results suggest the activation of (partly) distinct generating neuronal assemblies with contributions to the development of the VER response. A functional role in stimulus-related cortical synchronization during early visual processing is further suggested and appears consistent with the results of single-unit/multiunit animal research. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：950 / 958

页数：9

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