Tsoneva Tsvetomira, Baldo Davide, Lema Victor, Garcia-Molina Gary
Philips Research Europe, High Tech Campus 34, 5656AE Eindhoven, The Netherlands.
Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:3828-31. doi: 10.1109/IEMBS.2011.6090952.
Working memory is an essential component of human cognition and determines to a large extent an individual's intellectual ability. In this paper, the human brain oscillatory response system associated with working memory performance is evaluated in an experimental and analysis setting involving 10 volunteers performing a visual 2-back task. Event-related dynamics in three bands: theta (3.5-7 Hz), alpha (7.5-12 Hz) and upper beta (17-29 Hz) at 32 locations distributed over the scalp are examined analyzing the event-related desynchronization (ERD)/synchronization (ERS) in these bands. Both global dynamics as well as trial- and subject-specific trends were considered. The overall across participants trend shows that the theta level synchronizes during working memory engagement, whereas beta and alpha desynchronizes. While common features seem to emerge, different subjects exhibit equally significant but opposite in direction correlation between reaction time and power dynamics.
工作记忆是人类认知的重要组成部分，在很大程度上决定了个体的智力水平。在本文中，通过一项实验和分析设置，对与工作记忆表现相关的人类大脑振荡反应系统进行了评估，该实验有10名志愿者参与一项视觉2-back任务。通过分析头皮上32个位置的三个频段（θ波（3.5 - 7赫兹）、α波（7.5 - 12赫兹）和高β波（17 - 29赫兹））的事件相关去同步化（ERD）/同步化（ERS），研究了事件相关动态。同时考虑了整体动态以及试验和个体特有的趋势。所有参与者的总体趋势表明，在工作记忆参与过程中，θ波水平同步，而β波和α波去同步。虽然似乎出现了一些共同特征，但不同个体在反应时间与功率动态之间呈现出同样显著但方向相反的相关性。
