Preparatory distributed cortical synchronization determines execution of some, but not all, future intentions
Justin B Knight1, Richard L Marsh, Gene A Brewer
1BioImaging Research Center & Department of Psychology, University of Georgia, Athens, Georgia 30602-3013, USA.
Psychophysiology
|July 4, 2012
Summary
Brain activity differs when anticipating specific versus vague future intentions. Increased neural synchrony (steady-state visual evoked potential) before vague events predicted success, while it predicted failure for specific events.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Human Cognition
Background:
- Associating intentions with future events is key to human cognition.
- Neural dynamics of intention recognition and pre-event brain states remain poorly understood, especially concerning intention specificity.
Purpose of the Study:
- To investigate how pre-event brain states, measured by electroencephalography (EEG), differ based on intention specificity.
- To explore the relationship between neural activity and the successful completion of intentions with varying specificity.
Main Methods:
- Measured steady-state visual evoked potential (ssVEP) and intrinsic gamma synchronization using EEG.
- Analyzed neural activity preceding intention-cued events during an unrelated task.
- Correlated neural synchrony patterns with the subsequent completion or failure of intentions.
Main Results:
- Increased ssVEP and gamma synchronization were observed for ill-specified compared to well-specified events prior to their occurrence.
- Enhanced fronto-temporo-parietal ssVEP synchrony preceded ill-specified events.
- The degree of ssVEP synchrony predicted successful completion of ill-specified intentions but predicted failure for well-specified intentions.
Conclusions:
- Distinct neural states and executive processing are optimal for anticipating and fulfilling intentions.
- Intention specificity influences pre-event neural dynamics, impacting behavioral outcomes.
