Cortical beta oscillations map to shared brain networks modulated by dopamine.

Area of Science:

• Neuroscience
• Computational Neuroscience

Background:

• Brain rhythms, such as beta rhythms (13-35 Hz), are vital for neural communication and brain function.
• The precise organizational principles and circuit architecture of beta oscillations across various cognitive and emotional domains remain largely unknown.

Purpose of the Study:

• To investigate the circuit architecture of beta oscillations.
• To determine the distribution of beta rhythms across cortical areas.
• To identify the brain networks associated with beta activity and their relationship with dopamine.

Main Methods:

• Analysis of over 30 hours of invasive brain signals from 1772 channels in epilepsy patients.
• Mapping of parametrised oscillatory peaks to whole-brain functional and structural MRI connectomes.
• Correlation of identified networks with dopamine uptake data from positron emission tomography.

Main Results:

• Beta is identified as the most distributed cortical brain rhythm.
• A shared brain network involving beta-dominant cortical areas and deeper structures like the basal ganglia is revealed.
• Significant overlap is found between these beta networks and dopamine uptake.

Conclusions:

• Beta oscillations emerge from cortico-subcortical brain networks modulated by dopamine.
• This study provides a unifying, circuit-based framework for understanding beta activity beyond motor control.
• Findings suggest potential for beta activity as a feedback signal in neurotherapies for dopaminergic disorders.