Reward feedback stimuli elicit high-beta EEG oscillations in human dorsolateral prefrontal cortex

Reward-related feedback stimuli have been observed to elicit a burst of power in the beta frequency range over frontal areas of the human scalp. Recent discussions have suggested possible neural sources for this activity but there is a paucity of empirical evidence on the question. Here we recorded...

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Bibliographic Details
Published in:Scientific reports 2015-08, Vol.5 (1), p.13021-13021, Article 13021
Main Authors: HajiHosseini, Azadeh, Holroyd, Clay B.
Format: Article
Language:English
Subjects:
631/378/1595/1636
631/378/1595/2618
631/378/1788
631/378/2649/2150
Adolescent
Adult
EEG
Electroencephalography
Feedback
Female
Humanities and Social Sciences
Humans
Localization
Male
Mapping
Memory
multidisciplinary
Oscillations
Photic Stimulation
Prefrontal cortex
Prefrontal Cortex - physiology
Reaction Time
Reinforcement
Reward
Science
Short term memory
Young Adult
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Summary:Reward-related feedback stimuli have been observed to elicit a burst of power in the beta frequency range over frontal areas of the human scalp. Recent discussions have suggested possible neural sources for this activity but there is a paucity of empirical evidence on the question. Here we recorded EEG from participants while they navigated a virtual T-maze to find monetary rewards. Consistent with previous studies, we found that the reward feedback stimuli elicited an increase in beta power (20–30 Hz) over a right-frontal area of the scalp. Source analysis indicated that this signal was produced in the right dorsolateral prefrontal cortex (DLPFC). These findings align with previous observations of reward-related beta oscillations in the DLPFC in non-human primates. We speculate that increased power in the beta frequency range following reward receipt reflects the activation of task-related neural assemblies that encode the stimulus-response mapping in working memory.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep13021