Stimulus repetition modulates gamma-band synchronization in primate visual cortex

被引：94

作者：

Brunet, Nicolas M. ^{[1
,2
]}

Bosman, Conrado A. ^{[1
,3
]}

Vinck, Martin ^{[4
]}

Roberts, Mark ^{[1
,5
]}

Oostenveld, Robert ^{[1
]}

Desimone, Robert ^{[6
]}

De Weerd, Peter ^{[1
,5
]}

Fries, Pascal ^{[1
,4
]}

机构：

[1] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, NL-6525 EN Nijmegen, Netherlands

[2] Univ Pittsburgh, Dept Neurol Surg, Pittsburgh, PA 15213 USA

[3] Univ Amsterdam, Ctr Neurosci, Swammerdam Inst Life Sci, Cognit & Syst Neurosci Grp, NL-1098 XH Amsterdam, Netherlands

[4] Max Planck Gesell, Ernst Strungmann Inst ESI Neurosci Cooperat, D-60528 Frankfurt, Germany

[5] Maastricht Univ, Fac Psychol & Neurosci, Dept Cognit Neurosci, NL-6200 MD Maastricht, Netherlands

[6] MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2014年 / 111卷 / 09期

关键词：

adaptation; learning; oscillation; plasticity; priming; SHORT-TERM-MEMORY; NEURONAL SYNCHRONIZATION; TEMPORAL CORTEX; COHERENCE; ATTENTION; SUPPRESSION; SELECTIVITY; ADAPTATION; MECHANISMS; INCREASES;

D O I：

10.1073/pnas.1309714111

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

When a sensory stimulus repeats, neuronal firing rate and functional MRI blood oxygen level-dependent responses typically decline, yet perception and behavioral performance either stay constant or improve. An additional aspect of neuronal activity is neuronal synchronization, which can enhance the impact of neurons onto their postsynaptic targets independent of neuronal firing rates. We show that stimulus repetition leads to profound changes of neuronal gamma-band (similar to 40-90 Hz) synchronization. Electrocorticographic recordings in two awake macaque monkeys demonstrated that repeated presentations of a visual grating stimulus resulted in a steady increase of visually induced gamma-band activity in area V1, gamma-band synchronization between areas V1 and V4, and gamma-band activity in area V4. Microelectrode recordings in area V4 of two additional monkeys under the same stimulation conditions allowed a direct comparison of firing rates and gamma-band synchronization strengths for multiunit activity (MUA), as well as for isolated single units, sorted into putative pyramidal cells and putative interneurons. MUA and putative interneurons showed repetition-related decreases in firing rate, yet increases in gamma-band synchronization. Putative pyramidal cells showed no repetition-related firing rate change, but a decrease in gamma-band synchronization for weakly stimulus-driven units and constant gamma-band synchronization for strongly driven units. We propose that the repetition-related changes in gamma-band synchronization maintain the interareal stimulus signaling and sharpen the stimulus representation by gamma-synchronized pyramidal cell spikes.

引用

页码：3626 / 3631

页数：6

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