【摘要】 使用小波变换研究经颅磁刺激诱发的大脑皮层内电位的时频特性。结果表明,其诱发电位在时域内具有不同的波形、周期和潜伏期,具有兴奋性反应和抑制性反应。反应电位的连续小波变换谱由亮暗相间的“锥形”能量区组成,小波变换谱的高频区提供了能量的快速时变过程特性,低频区提供了能量的频率特性。本研究揭示了经颅磁场刺激诱发的在大脑皮层内的神经反应电位在时—频域的基本模式,对于脑科学的机理研究和临床应用均有重要意义。更多还原

【Abstract】 Using wavelet techniques,the time-scale representations of evoked complex spike potentials(CSP) induced by transcranial magnetic stimulation(TMS) in rodent auditory cortex were studied.The wavelet tranform expanded CSP into a time-scale representation,which allowed the analyst to zoom in on the small scale,fine structure details of CSP or zoom out to examine the large scale,global wave shape.That provided the information about both the time and frequency characteristics of CSP.Wavelet analyses of CSP would potentially suggest the physiological processes undergoing in the brain.更多还原