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The Functional Interactions between Cortical Regions through Theta-Gamma Coupling during Resting-State and a Visual
Ji Seon Ahn1,2, Jaeseok Heo1,2,3, Jooyoung Oh2,4
1Graduate Program in Cognitive Science, Yonsei University, Seoul 03722, Korea.
Brain Sciences
|February 25, 2022
Summary
Resting-state theta phase-gamma amplitude coupling (TGC) influences cognitive performance. While not higher during tasks, resting-state TGC topography impacts visual working memory network efficiency.
Area of Science:
- Neuroscience
- Cognitive Science
- Brain Activity
Background:
- Theta phase-gamma amplitude coupling (TGC) is vital for cognition.
- The role of resting-state TGC in cognitive preparation is unclear.
Purpose of the Study:
- Investigate the functional role of resting-state TGC.
- Compare TGC during rest versus visual working memory (VWM) tasks.
Main Methods:
- Electroencephalogram (EEG) recordings from 56 healthy volunteers.
- Measured TGC during resting state (eyes closed) and VWM task retention interval.
- Analyzed topographical distribution and local/large-scale network engagement.
Main Results:
- TGC modulation index was not significantly higher during VWM task compared to rest.
- Resting-state TGC topography negatively correlated with VWM task TGC locally.
- Resting-state TGC topography correlated with brain network engagement during VWM task.
Conclusions:
- Resting-state TGC reflects information processing and inter-areal signal interactions.
- TGC dynamics during rest may predict efficiency in competing brain networks during cognitive tasks.
