Improving emotional-action control by targeting long-range phase-amplitude neuronal coupling
Bob Bramson1, Hanneke Em den Ouden1, Ivan Toni1
1Donders Institute for Brain, Cognition and Behaviour, Centre for Cognitive Neuroimaging, Radboud University Nijmegen, Nijmegen, Netherlands.
Elife
|October 27, 2020
Summary
This study shows that targeted brain stimulation can enhance emotional control by improving communication between brain regions. This neurostimulation technique offers potential for treating conditions involving impaired emotional regulation.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neuromodulation
Background:
- Effective control over emotional action tendencies is crucial for social functioning.
- This control can be impaired in social psychopathologies and challenging situations.
- Frontal brain regions are known to implement emotional action control.
Purpose of the Study:
- To investigate if dual-site, phase-coupled brain stimulation can enhance emotional action control.
- To explore the neural mechanisms underlying improved emotional control.
- To provide causal evidence for the role of theta-gamma phase-amplitude coupling in action selection.
Main Methods:
- Administered dual-site, phase-coupled brain stimulation to healthy male participants.
- Utilized a social-emotional approach/avoidance task to challenge action control.
- Measured behavioral improvements in emotional action control.
- Used functional magnetic resonance imaging (fMRI) to assess neural effects.
Main Results:
- Participants demonstrated improved control over emotional action tendencies, dependent on stimulation parameters (phase and dose).
- Brain stimulation enhanced anterior prefrontal cortex inhibition over the sensorimotor cortex.
- fMRI data revealed increased efficacy of prefrontal inhibition as a mechanism for improved control.
Conclusions:
- Phase-amplitude coupling in frontal regions is a key mechanism for guiding action selection during emotional control.
- Physiologically-grounded interventions targeting neural communication can enhance emotional regulation.
- This approach holds potential for reducing neural noise in circuits reliant on phase-amplitude coupling.
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