Helton William S, Hollander Todd D, Warm Joel S, Tripp Lloyd D, Parsons Kelley, Matthews Gerald, Dember William N, Parasuraman Raja, Hancock Peter A
Michigan Technological University, Houghton, MI 49931, USA.
J Clin Exp Neuropsychol. 2007 Jul;29(5):545-52. doi: 10.1080/13803390600814757.
Transcranial Doppler sonography (TCD) and transcranial cerebral oximetry (TCCO) measures of cerebral blood flow velocity and oxygenation levels were collected during an abbreviated 12-min vigilance task. Both the TCD and TCCO measures showed higher levels of cerebral vascular activity in the right than in the left cerebral hemisphere; the cerebral laterality of vigilance occurs in an abbreviated task. Although there was a significant decline in performance over time, there was no significant change in the physiological measures over time during the abbreviated vigil. This latter finding does not match the physiological changes detected in long-duration vigils.
在一项为期12分钟的简化警觉任务中，收集了经颅多普勒超声（TCD）和经颅脑血氧饱和度测定（TCCO）所测得的脑血流速度和氧合水平。TCD和TCCO测量结果均显示，右侧大脑半球的脑血管活动水平高于左侧大脑半球；警觉的脑侧化现象出现在简化任务中。尽管随着时间推移表现显著下降，但在简化警觉任务期间，生理测量指标并未随时间发生显著变化。后一发现与长时间警觉任务中检测到的生理变化不相符。
