Detecting slow narrowband modulation in EEG signals
Detecting slow narrowband modulation in EEG signals
复制标题
检测脑电图信号中的慢速窄带调制
DOI:
10.1016/j.jneumeth.2022.109660
复制
发表时间:
2022
影响因子:
3
通讯作者:
Ching, ShiNung
中科院分区:
文献类型:
--
作者:
Loe, Maren E.;Morrissey, Michael J.;Tomko, Stuart R.;Guerriero, Réjean M.;Ching, ShiNung
BackgroundWe observed an unusual modulatory phenomenon in the electroencephalogram (EEG) of pediatric patients with acquired brain injury. The modulation is orders of magnitude slower than the fast EEG background activity, necessitating new analysis procedures to systematically detect and quantify the phenomenon.New methodWe propose a method for analyzing spatial and temporal relationships associated with slow, narrowband modulation of EEG. We extract envelope signals from physiological frequency bands of EEG. Then, we construct a sparse representation of the spectral content of the envelope signal across sliding windows. For the latter, we use an augmented LASSO regression to incorporate spatial and temporal filtering into the solution. The method can be applied to windows of variable length, depending on the desired frequency resolution.ResultsThe sparse estimates of the envelope power spectra enable the detection of narrowband modulation in the millihertz frequency range. Subsequently, we are able to assess non-stationarity in the frequency and spatial relationships across channels. The method can be paired with unsupervised anomaly detection to identify windows with significant modulation. We validated such findings by applying our method to a control set of EEGs.Comparison with existing methodsTo our knowledge, no methods have been previously proposed to quantify second order modulation at such disparate time-scales.ConclusionsWe provide a general EEG analysis framework capable of detecting signal content below 0.1 Hz, which is especially germane to clinical recordings that may contain multiple hours worth of continuous data.
登录
查看更多内容
影响因子:
4.7
作者:
Loe, Maren E.;Khanmohammadi, Sina;Morrissey, Michael J.;Landre, Rebekah;Tomko, Stuart R.;Guerriero, Réjean M.;Ching, ShiNung
通讯作者:
Ching, ShiNung
影响因子:
3.9
作者:
Nicholas P. Bertrand;Adam S. Charles;John Lee;Pavel Dunn;C. Rozell
通讯作者:
C. Rozell
影响因子:
3
作者:
Munia,Tamanna T. K.;Aviyente,Selin
通讯作者:
Aviyente,Selin
影响因子:
5.8
作者:
Friedman, Jerome;Hastie, Trevor;Tibshirani, Rob
通讯作者:
Tibshirani, Rob
影响因子:
3
作者:
Van Zaen, Jerome;Uldry, Laurent;Vesin, Jean-Marc
通讯作者:
Vesin, Jean-Marc