title: Beta oscillations and reward processing: Coupling oscillatory activity and hemodynamic responses.
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.
authors.affiliation: Cognition and Brain Plasticity Group [Bellvitge Biomedical Research Institute] IDIBELL, L'Hospitalet de Llobregat, Barcelona 08097, Spain.
authors.forename: Ernest
authors.initials: E
authors.lastname: Mas-Herrero
authors.affiliation: 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.
authors.forename: Pablo
authors.initials: P
authors.lastname: Ripollés
authors.affiliation: Dept. of Psychology, University of Victoria, P. O. Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada.
authors.forename: Azadeh
authors.initials: A
authors.lastname: HajiHosseini
authors.affiliation: 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.
authors.forename: Antoni
authors.initials: A
authors.lastname: Rodríguez-Fornells
authors.affiliation: 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.
authors.forename: Josep
authors.initials: J
authors.lastname: Marco-Pallarés
mesh_terms: D000328:Adult; D001611:Beta Rhythm; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D002755:Choice Behavior / Q000502:physiology; D003342:Corpus Striatum / Q000502:physiology; D004569:Electroencephalography / Q000379:methods; D005260:Female; D005625:Frontal Lobe / Q000502:physiology; D006624:Hippocampus / Q000502:physiology; D006801:Humans; D007858:Learning / Q000502:physiology; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D012201:Reward; D012815:Signal Processing, Computer-Assisted; D055815:Young Adult
keywords: Beta oscillations; JointICA; Reward; Time–frequency; fMRI