Electrophysiological correlates of vigilance during a continuous performance test in healthy adults
Electrophysiological correlates of vigilance during a continuous performance test in healthy adults
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DOI：
10.1023/b:apbi.0000039056.58787.76
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发表时间：
2004-09-01
影响因子：
3
通讯作者：
White, JN
中科院分区：
文献类型：
--
作者：
Bearden, TS;Cassisi, JE;White, JN
本研究评估了与健康成人持续警觉性相关的电生理活动模式。在进行连续性能测试（CPT）时记录定量脑电图（QEEG）。根据参与者在CPT的早期和后期的反应时间变化，他们被分为低警惕性组和高警惕性组。从基线、早期CPT和晚期CPT实验条件下的QEEG计算相干性测量。低警惕性组的参与者有较高的基线和CPT在α和β波段的额后一致性，这表明在整个研究中警惕性较低。此外，与高警惕性组相比，低警惕性组从基线到CPT初始部分的β 1波段相干性下降明显更大。在研究的所有阶段，与左半球的相同部位相比，联合组在多个频带上的右半球额后相干性明显较低。这些半球间的一致性差异与警觉性网络理论相一致，该理论认为右额叶和顶叶参与维持持续的注意力（M. I. Posner & M. E. Raichle, 1994）。
The present study evaluated patterns of electrophysiological activity associated with sustained vigilance in healthy adults. Quantitative electroencephalographs (QEEG) were recorded during the performance of a Continuous Performance Test (CPT). Participants were divided into low and high vigilance groups based upon their reaction time changes between the early and late portions of the CPT. Coherence measures were calculated from the QEEG across the baseline, early CPT, and late CPT experimental conditions. Participants in the low vigilance group had higher baseline and CPT frontal to posterior coherence in the alpha and beta bands suggestive of a less vigilant state throughout the entire study. Additionally, the low vigilance group had a significantly greater beta 1 band coherence drop from baseline to the initial portion of the CPT than the high vigilance group. The combined groups had significantly lower amounts of right hemisphere frontal to posterior coherence across a number of frequency bands throughout all of the phases of the study when compared to the homologous left hemisphere sites. These interhemispheric coherence differences are consistent with vigilance network theories that implicate the right frontal and parietal lobes in the maintenance of sustained attention ( M. I. Posner & M. E. Raichle, 1994).