Uncovering the Neural Signature of Lapsing Attention: Electrophysiological Signals Predict Errors up to 20 s before They Occur
Uncovering the Neural Signature of Lapsing Attention: Electrophysiological Signals Predict Errors up to 20 s before They Occur
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DOI：
10.1523/jneurosci.5967-08.2009
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发表时间：
2009-07-01
影响因子：
5.3
通讯作者：
Kelly, Simon P.
中科院分区：
文献类型：
--
作者：
O'Connell, Redmond G.;Dockree, Paul M.;Kelly, Simon P.
大脑活动的变化在多大程度上预示着人类的错误是不确定的，但具有重要的理论和实践意义。本研究考察了持续注意力缺失前皮层电信号的时间动态。21名参与者完成了一项持续时间预期任务，该任务包括持续监测有规律的交替模式刺激流，以检测持续时间长40%且很少发生的目标刺激。刺激流以25hz的频率闪烁，引发稳态视觉诱发电位（SSVEP），作为基本视觉处理的连续测量。α波段（8-14 Hz）的活动增加开始于靶失靶前20秒。随后，两个与事件相关的分量的振幅在短的目标前时间框架内下降：额叶P3（3-4秒）和随机负变化（在目标间隔期间）。相比之下，命中和未命中前的SSVEP振幅密切匹配，表明正在进行的基本视觉处理的效果不受影响。我们的研究结果表明，在错误发生前20秒，注意缺失的特定神经特征在脑电图中被记录下来。
The extent to which changes in brain activity can foreshadow human error is uncertain yet has important theoretical and practical implications. The present study examined the temporal dynamics of electrocortical signals preceding a lapse of sustained attention. Twenty-one participants performed a continuous temporal expectancy task, which involved continuously monitoring a stream of regularly alternating patterned stimuli to detect a rarely occurring target stimulus whose duration was 40% longer. The stimulus stream flickered at a rate of 25 Hz to elicit a steady-state visual-evoked potential (SSVEP), which served as a continuous measure of basic visual processing. Increasing activity in the alpha band (8-14 Hz) was found beginning similar to 20 s before a missed target. This was followed by decreases in the amplitude of two event-related components over a short pretarget time frame: the frontal P3 (3-4 s) and contingent-negative variation (during the target interval). In contrast, SSVEP amplitude before hits and misses was closely matched, suggesting that the efficacy of ongoing basic visual processing was unaffected. Our results show that the specific neural signatures of attentional lapses are registered in the EEG up to 20 s before an error.