乒乓球运动员动作识别时的脑电相干性分析

Electroencephalographic Coherence Analysis on Table Tennis Players during Action Recognition

目的:通过乒乓球发球动作识别实验过程中不同脑区的相干性分析,探讨乒乓球运动员发球动作识别时大脑皮层与皮层之间同步性变化的特征,了解大脑皮层之间功能耦合性。方法:采用64导脑电测试系统记录18名乒乓球运动员和18名乒乓球初学者观看发球旋转的动作视频时的脑电数据,基于Matlab平台计算低频alpha(8～10 Hz)、高频alpha(10～12Hz)、低频beta(13～22Hz)和高频beta(23～35Hz)频段内发球动作识别时半球内(顶叶与额叶、中央区、枕叶、颞叶)和脑区间(额叶、中央区、顶区、枕区和颞叶)的相干性。结果:研究结果显示,与运动新手相比,乒乓球运动员显示了更低的脑电相干性,半球脑区内低频alpha在双侧顶叶和额叶(P3-F3、P4-F4)、顶叶和颞叶(P3-T7、P4-T8),左侧顶叶与左侧中央区(P3C3),左侧顶叶与左侧枕叶(P3O1)的相干性低,高频alpha和低频beta频段在左侧顶叶与左侧中央区(P3C3)、左侧额叶(P3F3)、左侧枕叶(P3O1)、左侧颞叶(P3T7)均显示了低相干性,高频beta频段左侧顶叶与左侧额叶(P3F3)、左侧颞叶(P3T7)的相干性低;半球间在低频alpha频段内额叶(F3F4)、顶叶(P3P4)和中央运动区(C3C4)相干性低,高频al-pha和低频beta频段顶叶和中央运动区的相干性低。结论:与运动新手相比,运动专家发球动作识别时大脑皮层之间的功能耦合精细分化,主要涉及顶叶与额叶、颞叶脑区及中央运动脑区,暗示运动员发球动作识别时脑区间有效的功能耦合。

Objective：The aim of this study was to examine electroeneephalographic 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, 8 - 10 Hz ; high alpha, 10 -12 Hz ; low beta, 13 - 22 Hz ; and high beta, 23 -- 35 Hz） using site F3, F2, F4, C3, C2, C4, P3, Pz, P4, TT, T8, O1, Oz, and 02. 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-occipi- tal）, 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. Conelusion： 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.