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

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Neuroimaging

Background:

• Reward processing involves diverse cortical and subcortical brain regions.
• Mid-frontal beta oscillatory activity (BOA) increases post-reward, potentially aiding network coordination.

Purpose of the Study:

• To investigate the association between mid-frontal BOA and brain network engagement during reward processing.
• To test the hypothesis that BOA is a mechanism for coordinating reward-related brain activity.

Main Methods:

• Twenty subjects performed a monetary gambling task across separate EEG and fMRI sessions.
• Time-frequency EEG data and fMRI activity were fused using Joint Independent Component Analysis (ICA).

Main Results:

• Monetary gains elicited increased mid-frontal BOA.
• This BOA was associated with the activation of a fronto-striatal-hippocampal network.

Conclusions:

• Mid-frontal BOA plays a role in reward processing.
• This activity supports the engagement of brain networks involved in reward-related memory enhancement.