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首页> 外文期刊>The European Journal of Neuroscience >Repetition priming effects dissociate between miniature eye movements and induced gamma-band responses in the human electroencephalogram
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Repetition priming effects dissociate between miniature eye movements and induced gamma-band responses in the human electroencephalogram

机译：重复启动效应在人类脑电图中的微小眼球运动和诱发的伽马带反应之间不相关

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摘要

The role of induced gamma-band responses (iGBRs) in the human electroencephalogram (EEG) is a controversial topic. On the one hand, iGBRs have been associated with neuronal activity reflecting the (re-) activation of cortical object representations. On the other hand, it was shown that miniature saccades (MSs) lead to high-frequency artifacts in the EEG that can mimic cortical iGBRs. We recorded EEG and eye movements simultaneously while participants were engaged in a combined repetition priming and object recognition experiment. MS rates were mainly modulated by object familiarity in a time window from 100 to 300 ms after stimulus onset. In contrast, artifact-corrected iGBRs were sensitive to object repetition and object familiarity in a prolonged time window. EEG source analyses revealed that stimulus repetitions modulated iGBRs in temporal and occipital cortex regions while familiarity was associated with activity in parieto-occipital regions. These results are in line with neuroimaging studies employing functional magnetic resonance imaging or magnetoencephalography. We conclude that MSs reflect early mechanisms of visual perception while iGBRs mirror the activation of cortical networks representing a perceived object.
机译：在人类脑电图（EEG）中诱导伽马波段反应（iGBR）的作用是一个有争议的话题。一方面，iGBR与神经元活动相关，反映了皮层物体表征的（重新）激活。另一方面，研究表明，微型扫视（MS）会导致EEG中的高频伪影，从而模仿皮质iGBR。在参与者参与重复启动和对象识别实验的同时，我们同时记录了脑电图和眼睛运动。 MS率主要受刺激发生后100到300毫秒的时间窗口中对象熟悉程度的影响而调节。相反，伪影校正的iGBR在较长的时间范围内对对象重复和对象熟悉度敏感。脑电图的来源分析表明，刺激重复调节颞和枕皮质区域的iGBR，而熟悉程度与顶枕区域的活动有关。这些结果与采用功能磁共振成像或脑磁图的神经影像学研究相一致。我们得出的结论是，MS反映了视觉感知的早期机制，而iGBR则反映了代表感知物体的皮质网络的激活。

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