摘要
目的：探讨乒乓球运动员发球技术动作识别时所诱发大脑激活的时间进程和半球效应。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动作视频时的事件相关电位,了解动作识别的时间进程和半球效应。结果：（1）启动时间在70~150 ms感知分析阶段诱发了明显的枕区P1成分,专家组的潜伏期长于新手组,而在额区诱发了N1成分和左侧枕区的P2成分;（2）250~900 ms为动作识别的比较编码阶段,诱发了枕区和顶区的P300成分和PSW成分,大脑左侧半球的PSW成分平均波幅高于右侧半球;（3）900~1300 ms为动作识别的匹配识别阶段,诱发了LNC成分,900~1000 ms时间窗表现为中央运动区和额区的激活;1000~1100 ms时间窗表现为额区和右侧顶区激活;1100~1200 ms时间窗和1200~1300 ms时间窗均表现为额区和中央运动区激活,左侧半球激活大于右侧半球激活。与运动新手相比,运动专家LNC成分的平均波幅更小。结论：运动员进行动作识别的时间进程如下：运动信息感知-特征知觉-信息比较编码-信息模式的匹配识别,其中匹配识别是动作识别的核心过程。左半球在动作识别中表现出优势效应。
Objective The purpose of this study was to investigate the brain action and hemispheric effects during the course of serving action recognition of table tennis players. Methods Electroencephalogram（64 channels） of 18 expert table tennis players and 18 novice table tennis players was simultaneously recorded during the players watching a series of serving videos to obtain their reaction time and event-related potentials（ERP） of judging the rotation of serving ball. Results（1）P1component was evoked at occipital,N1 at frontal and P2 at left occipital during the perceptual analysis phase（70-150ms）.（2）P300 and PSW components were evoked at occipital and parietal. The mean amplitude of the PSW component in the left hemisphere was higher than the right in all players during the comparison coding phase（250-900ms）.（3）LNC component was evoked during the matching recognition phase（900-1300ms）manifesting as the activation of central and the frontal areas（900-1000ms）,activation of frontal and right parietal（1000-1100ms）. The activation of left hemisphere was greater than the right. The mean amplitudes of LNC of the experts were smaller than the novices.Conclusions It was proposed that the temporal course of action recognition was as follows：sports information perception,feature perception,comparison of coding,and matching recognition,in which the matching recognition is the core processing of the action recognition.
出处
《中国运动医学杂志》
CAS
CSCD
北大核心
2014年第8期804-812,共9页
Chinese Journal of Sports Medicine
基金
教育部博士点基金项目(20113156110002)
2011年度教育部人文社会科学一般项目(青年项目11YJCZH165)
关键词
乒乓球运动员
发球
动作识别
事件相关电位
table tennis player
rotation of serving ball
action recognition
event-related potentials（ERPs）
