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首页> 外文期刊>NeuroImage >The BOLD correlates of the visual P1 and N1 in single-trial analysis of simultaneous EEG-fMRI recordings during a spatial detection task.
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The BOLD correlates of the visual P1 and N1 in single-trial analysis of simultaneous EEG-fMRI recordings during a spatial detection task.

机译：在空间检测任务期间同时进行的EEG-fMRI记录的单次试验分析中，视觉P1和N1的粗体相关。

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Simultaneous EEG-fMRI measurements can combine the high spatial resolution of fMRI with the high temporal resolution of EEG. Therefore, we applied this approach to the study of peripheral vision. More specifically, we presented visual field quadrant fragments of checkerboards and a full central checkerboard in a simple detection task. A technique called "integration-by-prediction" was used to integrate EEG and fMRI data. In particular, we used vectors of single-trial ERP amplitude differences between left and right occipital electrodes as regressors in an ERP-informed fMRI analysis. The amplitude differences for the regressors were measured at the latencies of the visual P1 and N1 components. Our results indicated that the traditional event-related fMRI analysis revealed mostly activations in the vicinity of the primary visual cortex and in the ventral visual stream, while both P1 and N1 regressors revealed activation of areas in the temporo-parietal junction. We conclude that simultaneous EEG-fMRI in a spatial detection task can separate visual processing at 100-200 ms from stimulus onset from the rest of the information processing in the brain.
机译：同时进行EEG-fMRI测量可以将fMRI的高空间分辨率与EEG的高时间分辨率结合在一起。因此，我们将这种方法应用于周围视觉的研究。更具体地说，我们通过简单的检测任务介绍了棋盘的视场象限碎片和整个中央棋盘。使用一种称为“按预测积分”的技术来积分EEG和fMRI数据。特别地，我们在左枕骨电极和右枕骨电极之间的单次ERP振幅差异矢量作为ERP知悉的fMRI分析的回归指标。在视觉P1和N1分量的等待时间测量回归变量的幅度差。我们的结果表明，传统的与事件相关的功能磁共振成像分析显示，主要是在初级视觉皮层附近和腹侧视觉流中激活，而P1和N1回归指标都显示了颞顶顶交界处的激活。我们得出的结论是，在空间检测任务中同时进行EEG-fMRI可以将100-200 ms的视觉处理从刺激发作与大脑中其余信息处理分开。

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