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  • Title: Decomposing N2 NOGO wave of event-related potentials into independent components.
    Author: Kropotov JD, Ponomarev VA.
    Journal: Neuroreport; 2009 Dec 09; 20(18):1592-6. PubMed ID: 19904220.
    Abstract:
    Inconsistencies in previous attempts to localize the N2 wave in the GO/NOGO task led to the present investigation. The inconsistencies were probably because of heterogeneity of psychological operations involved in GO/NOGO tasks. We applied the independent component analysis to a collection of individual event-related potentials in response to GO and NOGO cues in the two stimulus visual GO/NOGO task. The selected six independent components with different topographies and time courses constituted 87% of the artifact-free signal variance. Three of them were loaded into the frontally distributed N2 wave. According to standardized low-resolution electromagnetic tomography these three independent components were generated in the supplementary motor cortex, left angular gyrus and anterior cingulate cortex.
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