Kiroy V N, Warsawskaya L V, Voynov V B
Institute for Neurocybernetics, University of Rostov-on-Don, Russia.
Int J Neurosci. 1996 Mar;85(1-2):31-43. doi: 10.3109/00207459608986349.
The goal of the present study was to investigate the EEG spectral power changes caused by prolonged (6 hours) intensive mental loading consisted of calculation and choice-reaction tasks. The EEGs were analysed both during the tasks performance and in rest periods at the beginning of the work (after subjects had already mastered the tasks) and at the end. The significant increase both of slow (delta, theta) and fast (beta) activities was shown at the end of the work. The observed EEG spectral power changes with time on task were similar during the different tasks performance as well as in the rest conditions indicating the general character of the observed phenomena. These results are interpreted as reflecting the deterioration of general brain state activity caused by prolonged mental work and the simultaneous additional brain activation to provide sufficient vigilance level and successful tasks performance (the subjects being highly motivated).
本研究的目的是调查由持续6小时的高强度脑力负荷（包括计算和选择反应任务）所引起的脑电图频谱功率变化。在任务执行期间以及工作开始时（受试者已经掌握任务之后）和结束时的休息期间，对脑电图进行了分析。工作结束时，慢波（δ波、θ波）和快波（β波）活动均显著增加。在不同任务执行期间以及休息状态下，观察到的脑电图频谱功率随任务时间的变化是相似的，这表明所观察到的现象具有普遍性。这些结果被解释为反映了长时间脑力工作导致的大脑整体状态活动的恶化，以及同时额外的大脑激活以提供足够的警觉水平并成功完成任务（受试者积极性很高）。
