Improving the measurement of the latency of cortical evoked potentials
Ling E. Wang · Guoji shengwu yixue gongcheng zazhi · 2009
Objective To determine the clear onset point of cortical evoked potentials and improve the latency measurement.Methods Cortical evoked potential signals were extracted by animal experiment and a new method based on median filter Was applied to measure their lateneies.Resuits The most widely used method of averaging process had an effect of smoothing the edges of signals,which nlade it difficult to determine the onset potential of the averaged wavefoiTn.New method based on median filtering can give clearer onset point of evoked potential compared to the averaging method.Conclusion New method based Oil median filtering can avoid factitious error in latency nleasurement by giving clearer onset point. Key words: Cortical evoked potentials; Latency; Median filter