CAJ | 학술논문

在脑电头皮电位的测量技术中,零参考点的选取一直是一个争论的焦点,研究人员都希望找到一个可行的通用参考零点,以方便研究成果间的比较和借鉴.针对脑电头皮电位质心的计算问题,用仿真和实际数据计算比较了平均参考、连接耳参考、头顶参考和新近出现的近似零参考技术(REST)方法的差异,结果表明,采用REST可使得电位质心的计算误差在多数情况下更小.说明在进行质心等与脑电波形相关的计算时,采用近似的REST可以获得更为真实的计算结果.
재뇌전두피전위적측량기술중,령삼고점적선취일직시일개쟁론적초점,연구인원도희망조도일개가행적통용삼고영점,이방편연구성과간적비교화차감.침대뇌전두피전위질심적계산문제,용방진화실제수거계산비교료평균삼고、 련접이삼고、두정삼고화신근출현적근사령삼고기술(REST)방법적차이,결과표명,채용REST가사득전위질심적계산오차재다수정황하경소.설명재진행질심등여뇌전파형상관적계산시,채용근사적REST가이획득경위진실적계산결과.
The choice of reference is a critical issue in EEG measurement.An available common neutral reference facilitating the data comparison and analysis is anticipated.This paper applies simulation and actual data to make a comparative analysis of the effects of the four different references:average reference,linked mastoids reference,Cz reference and zero reference realized by the recently-developed REST(reference electrode standardization technique) for calculating the center of mass of EEG.The results show that the amplitude error induced by REST is the smallest in most cases.Such a fact indicates that the results attained by using REST come truer when the case is related to EEG waveform such as calculating the center of mass of EEG.