Resting EEG Delta Affects Go-Related Decision-Making Efforts
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1
University of Wollongong, School of Psychology, Australia
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2
Western Sydney University, NICM, Australia
Aims
Few studies have assessed the impacts of resting electroencephalographic (EEG) activity on task performance measures, particularly for both event-related potentials (ERPs) and behavioural outcomes. To ascertain the role of the brain’s intrinsic activity in stimulus-response processing, 20 healthy young adults had EEG recorded at rest, with eyes-closed (EC) then with eyes-open (EO), and subsequently during an auditory equiprobable Go/NoGo task. Participants were instructed to press a button to the designated Go tone and to avoid responding to the NoGo.
Method
Intrinsic brain activity was measured during EC and EO resting states, with EEG data segmented into 1 s epochs for Fast-Fourier transformation. Mean spectral band amplitudes were derived for delta, theta, alpha, and beta, with the difference between EC and EO also calculated as a measure of reactive change. Go/NoGo performance was assessed behaviourally through error rates, mean reaction times (RTs), and RT variability (RTV), and electrophysiologically using stimulus-locked ERPs (-100 to 600 ms) subjected to temporal PCA for component extraction. To confirm the ERP components involved in response outputs, correlations were calculated between ERP component amplitudes and behavioural outcomes. Resting EC band amplitudes and EC to EO EEG reactivity were then input as predictors into multiple regression analyses with Go/NoGo behavioural measures and their ERP correlates as dependent variables.
Results
Go RTV correlated positively with Go P2 amplitude, and mean RTs were negatively correlated with N2c and P3b amplitudes. Stepwise regression models for these response variables revealed EC midline delta as a significant predictor of Go P3b positivity. No significant relationships were found for NoGo performance.
Conclusion
The present results confirm involvement of P2, N2c, and P3b in the decision-making process to respond to the task-relevant Go stimulus, and highlight resting delta’s functional relevance to these cognitive operations.
Keywords:
Electroencephalography (EEG),
event-related potentials (ERPs),
Principal Components Analysis (PCA),
decision-making,
Attention,
Cognition
Conference:
ASP2016 - The 26th Annual Meeting of the Australasian Society for Psychophysiology, Adelaide Australia, Adelaide,SA, Australia, 12 Dec - 14 Dec, 2016.
Presentation Type:
Oral Presentation
Topic:
Abstract (student award)
Citation:
Karamacoska
D,
Barry
RJ and
Steiner
GZ
(2016). Resting EEG Delta Affects Go-Related Decision-Making Efforts.
Conference Abstract:
ASP2016 - The 26th Annual Meeting of the Australasian Society for Psychophysiology, Adelaide Australia.
doi: 10.3389/conf.fnhum.2016.221.00017
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Received:
31 Oct 2016;
Published Online:
05 Dec 2016.
*
Correspondence:
Miss. Diana Karamacoska, University of Wollongong, School of Psychology, Wollongong, Australia, d.karamacoska@westernsydney.edu.au