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乒乓球属于开放式运动项目,它要求运动员的反应既要快又要准。目前,有关EEG与反应时之间关系的研究存在分歧。而对哪些脑电活动有利于优秀乒乓运动员反应的研究更少。研究目的:探索运动员接受刺激前的脑电α频段功率与反应时之间的关系。研究对象:15 名优秀男子乒乓运动员,年龄为16～35 岁,均为右势手。研究方法: 被试者完成一项有提示的反应任务,同时,记录大脑F3、F4、C3、C4、T5、T6、P3、P4、OL、OR处的脑电α频段功率值。反应任务由一个提示性刺激和必须应答的刺激组成。被试者通过按鼠标做反应。提示性刺激和必须应答的刺激间间隔1500ms。分别计算出前750ms和后750ms的α1和α2频段的功率值。根据中位数把被试者分为反应快组和反应慢组。对测试结果进行双因素方差分析。研究结果:左顶和右后枕区的α1频段功率值表现出反应时与脑电的测试时间存在交互作用。进一步的分析结果表明,反应快者在提示刺激与必须应答的刺激间的前750s的脑电α1频段的功率值高。这一结果说明左顶和右后枕区的α1频段的功率值可能是乒乓训练中有效反应的关键。
Table tennis is an open sports program, which requires that athletes respond faster and better. At present, there is disagreement about the relationship between EEG and response time. Fewer studies have been conducted on which EEG activities favor excellent table tennis player responses. The purpose of this study was to explore the relationship between the alpha frequency of EEG and the response time before the athletes received stimulation. Subjects: 15 outstanding men’s table tennis athletes, aged 16 to 35 years old, are right-handed. Methods: The subjects completed a prompt reaction task and recorded the EEG α-band power values at the F3, F4, C3, C4, T5, T6, P3, P4, OL and OR of the brain. The response task consists of a prompt stimulus and the stimuli that must be answered. The subjects responded by pressing the mouse. Prompt stimulation and the stimulus must be interval 1500ms. Calculate the power values for the α1 and α2 bands for the first 750ms and the later 750ms, respectively. The subjects were divided into fast response group and slow response group according to median. Two-way analysis of variance of the test results. Results: The α1-band power values of the left parietal and right posterior occipitocele showed interaction with EEG test time. Further analysis of the results showed that fast response in the prompt stimulation and must be stimulated between the first 750s of EEG high frequency power between the frequency band. This result shows that the power values of the α1 band in the left and right posterior occiput regions may be the key to effective response in ping pong training.