Electroencephalographic Coherence Analysis on Table Tennis Players during Action Recognition

Objective:The aim of this study was to examine electroencephalographic coherence to determine the relation between cortico-cortical communications of table tennis players during action recognition.Method:EEG(64 channels) were simultaneously recorded in 18 expert table tennis players and 18 novice table tennis players.During the EEG recordings,they observed table tennis serve action.Coherence was assessed for four frequency bands(low alpha,8¹0 Hz;high alpha,10¹2 Hz;low beta,13²2 Hz;and high beta,23³5 Hz) using site F3,Fz,F4,C3,Cz,C4,P3,Pz,P4,T7,T8,O1,Oz,and O2.Statistical results showed that compared to the novice,experts exhibited lower coherence in bilateral parietal-frontal(P3-F3 and P4-F4 electrodes) and parietal-temporal(P3-T7 and P4-T8 electrodes),and between left particle(P3) and left central,occipital region for low-alpha frequency in intra-hemispheric,high-frequency alpha(left parietal-frontal,parietal-temporal,parietal-central,parietal-occipital),the same applies to lower-frequency beta.High-frequency beta(left parietal-frontal,parietal-temporal).Inter-hemispheric low-frequency alpha(frontal regions,parietal regions,central regions),high-frequency alpha(parietal regions,central regions),and low-frequency beta(parietal regions,central regions) is less communication.Conclusion:The results reveal that compared to novice,expert engage in less cortico-cortical communication,particularly between left parietal association and frontal,central.The results support refinement of cortical functional coupling in expert.