Link Alfred, Burghoff Martin, Salajegheh Anna, Poeppel David, Trahms Lutz, Elster Clemens
Physikalisch-Technische Bundesanstalt, Berlin, Germany.
Biomed Tech (Berl). 2007 Feb;52(1):106-10. doi: 10.1515/BMT.2007.020.
Two methods for single-trial analysis were compared, an established parametric template approach and a recently proposed non-parametric method based on complex bandpass filtering. The comparison was carried out by means of pseudo-real simulations based on magnetoencephalography measurements of cortical responses to auditory signals. The comparison focused on amplitude and latency estimation of the M100 response. The results show that both methods are well suited for single-trial analysis of the auditory evoked M100. While both methods performed similarly with respect to latency estimation, the non-parametric approach was observed to be more robust for amplitude estimation. The non-parametric approach can thus be recommended as an additional valuable tool for single-trial analysis.
比较了两种单次试验分析方法，一种是既定的参数模板法，另一种是最近提出的基于复带通滤波的非参数法。通过基于对听觉信号皮层反应的脑磁图测量的伪真实模拟来进行比较。比较集中在M100反应的幅度和潜伏期估计上。结果表明，这两种方法都非常适合听觉诱发M100的单次试验分析。虽然两种方法在潜伏期估计方面表现相似，但观察到非参数方法在幅度估计方面更稳健。因此，非参数方法可作为单次试验分析的一种额外有价值的工具推荐使用。
