Spectral characteristics and linear-nonlinear synchronization changes of different EEG frequency bands during the CNV.
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.
Molnár
Márk
M
Institute of Psychology, Hungarian Academy of Sciences, Budapest, Hungary. molnar@cogpsyphy.hu
Csuhaj
Roland
R
Gaál
Zsófia Anna
ZA
Czigler
Balázs
B
Ulbert
István
I
Boha
Roland
R
Kondákor
István
I
D000328:Adult; D000513:Alpha Rhythm; D001611:Beta Rhythm; D003265:Contingent Negative Variation / Q000502:physiology*; D003344:Cortical Synchronization; D003627:Data Interpretation, Statistical; D004569:Electroencephalography; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D017711:Nonlinear Dynamics; D011597:Psychomotor Performance / Q000502:physiology; D013826:Theta Rhythm