我国优秀马拉松运动员比赛前后脑电图电子计算机分析的研究

本文报告17名马拉松运动员比赛前后的脑电图,并应用计算机信号处理技术对图形进行功率谱和视觉诱发电位分析。指出运动后脑电的改变表明疲劳已影响至中枢神经系统。运用计算机方法具有处理信息量大、分析客观并可定量表示等优点。

A STUDY ON THE COMPUTER ANALYSIS OF EEG IN ELITE MARATHONERS BEFORE AND AFTER COMPETITION

Using computerized technique, this article analyses the EEG in marathoners before and afterrace. Our tests involved 17 Chinese runners who participated in the Beijing International Marathon in1984. EEG recordings were taken by means of a Kohden 5210 electroencephalograph and a San-ei NFR3915 magnetic recorder 2--3 days before the race and 0.5--3.5 hrs immediately after it. The recordingswere introduced into a 7T08 medical computer, through which the spontaneous power spectrum andvisual evoked potentials (VEP) were calculated, and the results were records by an X-Y oscillograph.All data are comparisons between pre-and post- race tests. Results of the post-race test: 1) Frequency shift--the main peak of power spectrum shifted to the left. In other words, thefrequency of power spectrum tended to decrease (P<0.025); 2) The mean value of power spectrum increased in the 2-7.9 Hz band (p<0.005 in C_4, O_2); 3) Power spectrum tended to increase in 8--9.9 Hz; while decreasing markedly in 10-12.9 Hz (P<0.025). The power spectrum tended to decrease in the total alpha band; 4) Power spectrum slightly decreased in 13--27.7 Hz (NS). VEP; None of the peak amplitude responses for N_1, P_2, N_2 or P_3 were significantly altered. Thelatency as represented by the positive wave of 70 ms was markedly lowered (p<0.05). The EEG changes indicated that ultra-long distance running affected not only the muscular andcardiopulmonary system but also the CNS.