实弹射击瞄准期间大脑alpha波频段功率特性研究

目的：在实弹射击条件下，研究瞄准期间脑电信号（EEG）中alpha波频段的功率特性，及其与射击成绩的关系。方法：采用Holter-16D便携式脑电信号放大器，采集参加全国司法警察大比武陕西代表队选拔集训的法警在射击训练中的EEG，通过功率谱分析和时频分析，得到被试alpha主频（IAF）、左右颞区alpha波段功率差值。结论：1.在静息态时，射击运动想象时所运用的alpha波类型划分方法不能完全适用于实弹射击前的静息态中。2.在实弹射击瞄准期间，左右脑alpha波频段功率偏差值与alpha波集中于左颞区的趋势呈正相关。3.在实弹射击中，瞄准期间左右脑alpha波频段功率偏差值与射击成绩呈正相关。

The Research on the Charactersof Alpha Frequency in the Aiming Period in Real Guns and Bullets Shooting

The purpose of this research is to study the characters of alpha frequency power in the period of aiming in the condition of real guns and bullets shooting, as well as its relationship with shooting performance. Holter-16D is used in this research. And the subjects are those who are ready to take part in the First National Competition of Bailiff representing Shan Xi Province. We use time-frequency analysis method and individual alpha frequency (IAF) to analyze EEG, and get the power spectrum deviation value of alpha frequency between T3 and T4. The following results are obtained: 1.the way to divide alpha frequency into five types which is applied in motion imagery is not totally applied in the real guns and bullets shooting. 2.in aiming period, the power energy deviation value of alpha frequency between left and right brain is positively related with the trend that alpha frequency is centered on, while is lower positively related with shooting performance.