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Neuroimage. 2015 Oct 1;119:13-9. doi: 10.1016/j.neuroimage.2015.05.095. Epub 2015 Jun 10.

Beta oscillations and reward processing: Coupling oscillatory activity and hemodynamic responses.

Author information

1
Cognition and Brain Plasticity Group [Bellvitge Biomedical Research Institute] IDIBELL, L'Hospitalet de Llobregat, Barcelona 08097, Spain.
2
Cognition and Brain Plasticity Group [Bellvitge Biomedical Research Institute] IDIBELL, L'Hospitalet de Llobregat, Barcelona 08097, Spain; Dept. of Basic Psychology, University of Barcelona, Barcelona 08097, Spain.
3
Dept. of Psychology, University of Victoria, P. O. Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada.
4
Cognition and Brain Plasticity Group [Bellvitge Biomedical Research Institute] IDIBELL, L'Hospitalet de Llobregat, Barcelona 08097, Spain; Dept. of Basic Psychology, University of Barcelona, Barcelona 08097, Spain; Catalan Institution for Research and Advanced Studies, ICREA, Barcelona 08010, Spain.
5
Cognition and Brain Plasticity Group [Bellvitge Biomedical Research Institute] IDIBELL, L'Hospitalet de Llobregat, Barcelona 08097, Spain; Dept. of Basic Psychology, University of Barcelona, Barcelona 08097, Spain. Electronic address: josepmarco@gmail.com.

Abstract

Diverse cortical and subcortical regions are synergically engaged during reward processing. Previous studies using time-frequency decomposition of Electroencephalography (EEG) data have revealed an increase of mid-frontal beta oscillatory activity (BOA) after reward delivery, which could be a potential mechanism in the coordination of the different areas engaged during reward processing. In order to evaluate this hypothesis, twenty subjects performed a monetary gambling paradigm in two separate sessions (EEG and fMRI). Time-frequency oscillatory EEG data and fMRI activity were fused using Joint Independent Component Analysis (ICA). The present results showed that mid-frontal BOA elicited by monetary gains is associated with the engagement of a fronto-striatal-hippocampal network previously involved in reward-related memory enhancement, supporting the role of this activity during reward processing.

KEYWORDS:

Beta oscillations; JointICA; Reward; Time–frequency; fMRI

[Indexed for MEDLINE]

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