8—11岁儿童乒乓球运动员运动表象时的EMG和EEG特征

EMG and EEG Patterns in Juvenile Table Tennis Players During Imagery Practice

以18名8—11岁(男10人,女8人)儿童乒乓球运动员为被试,研究了运动员表象时的肌电图(EMG)和脑电图(EEG)特征。结果发现,运动表象时,手臂肌电活动没有显著性变化;左右枕叶和左右中央区2—7.9HZ的慢波功率谱百分比显著下降,左右中央区11.1—27HZ的β波功率谱百分比显著下降;IEMG值与02部位α波功率谱百分数.01部位β波功率谱分数和02部位β波功率谱百分数的相关系数分别为-0.88,-0.71和0.65。讨论了上述结果与前人以成人为被试得到的结果有所不同的原因。

Eighteen juvenile players (ten boys and eight girls 8-11 years of age)were taken as subjects in a study of EMG and EEG patterns during imagery practice. The following findings were obtained: There was no significant change in EMG in the arm during imagery practice;the power ratio of 2-7. 9 HZ in 01, 02 , C3 and C4 decreased and the power ratio of 11. 1-27 HZ in C3 and C4 also decreased;the correlation coefficients of 8-11 HZ in 02, the power ratio of 11. 1-27 HZ in 01, and the power ratio of 11. 1-27 HZ in 02 were -0. 88, -0. 71 and 0. 65 respectively. Explanations were given as to why the above results were quite different from those found in adults in previous studies.