Molnár Márk, Csuhaj Roland, Gaál Zsófia Anna, Czigler Balázs, Ulbert István, Boha Roland, Kondákor István
Institute of Psychology, Hungarian Academy of Sciences, Budapest, Hungary.
Psychophysiology. 2008 May;45(3):412-9. doi: 10.1111/j.1469-8986.2008.00648.x. Epub 2008 Feb 4.
During the CNV recorded in a simple auditory working memory task, task-specific decrease of the relative delta band and a transient increase of the absolute theta band were seen, accompanied by an increase of the absolute alpha1 and alpha2 bands in the posterior region. The decreased delta power probably corresponds to increased task-evoked arousal, whereas the transient theta power increase corresponds to working memory demand and possibly to the orienting response. The increased alpha1 and alpha2 power may be a manifestation of a top-down mechanism revealing control over the execution of a response. The area-specific, task-related, and frequency-dependent changes of EEG complexity measures indicate frontally increasing complexity during the early part of the CNV in the beta frequency bands, which underscores the importance of this region in the mechanisms of anticipatory behavior.
在一个简单听觉工作记忆任务中记录到的关联性负变（CNV）期间，观察到相对δ频段的任务特异性降低以及绝对θ频段的短暂增加，同时后部区域的绝对α1和α2频段也增加。δ功率降低可能对应于任务诱发的唤醒增加，而θ功率的短暂增加对应于工作记忆需求，也可能对应于定向反应。α1和α2功率增加可能是一种自上而下机制的表现，揭示了对反应执行的控制。脑电图复杂性测量的区域特异性、任务相关性和频率依赖性变化表明，在β频段的CNV早期，额叶区域的复杂性增加，这突出了该区域在预期行为机制中的重要性。
