[Statistical VEP analysis for approximate determination of ... | 合法醫療器材資訊網

由TEmskötter著作·1984—[StatisticalVEPanalysisforapproximatedeterminationoflatencydistributionofvisuallyevokedsinglecorticalstimulusresponses].EEGEMGZ ...

It is suggested that disturbances of excitation velocity in optic nerve disease go along with a temporal heterogenity of impulse conduction which subsequently may be responsible for an increased variability of latencies of cortical visual evoked potentials. Since the latencies of each single evoked response, being superimposed by EEG-background activity, cannot be measured, we developed a computer-assisted statistical technique in an attempt to quantify this variability. Random samples (n = 30) were taken from the whole of stimulus-correlated EEG-segments recorded during a clinical routine examination (n = 200) and averaged to give a number (n = 30) of randomly sampled VEPs. The results of the statistical analysis, by calculating the variability of the latency values of these samples, can be taken as an approximation of the real variability of latency of single evoked potentials. It could be demonstrated that the va...