Space-time event sparse penalization for magneto-/electroencephalography.

Space-time event sparse penalization for magneto-/electroencephalography.
复制标题

DOI:
10.1016/j.neuroimage.2009.01.056
复制
发表时间:
2009-07-15
期刊:
影响因子:
5.7
通讯作者:
Nowak R
Nowak R
中科院分区:
医学1区
文献类型:
--
作者:
Bolstad A;Van Veen B;Nowak R

文献摘要

参考文献

被引文献

相似文献

本文提出了一种新的时空方法M/EEG源重建的基础上的假设,只有少量的事件,定位在空间和/或时间,是负责测量信号。每个时空事件都使用基函数展开来表示,该基函数展开反映了信号的最相关(或可测量)特征。这种神经活动模型自然会导致贝叶斯似然函数,该函数平衡了模型对数据的拟合与模型的复杂性,其中复杂性与所包括的事件的数量有关。提出了一种新的最大化似然函数的期望最大化算法。新方法被证明是有效的几个MEG模拟的神经活动,以及从一个自步速的手指敲击实验的数据。
This article presents a new spatio-temporal method for M/EEG source reconstruction based on the assumption that only a small number of events, localized in space and/or time, are responsible for the measured signal. Each space-time event is represented using a basis function expansion which reflects the most relevant (or measurable) features of the signal. This model of neural activity leads naturally to a Bayesian likelihood function which balances the model fit to the data with the complexity of the model, where the complexity is related to the number of included events. A novel Expectation-Maximization algorithm which maximizes the likelihood function is presented. The new method is shown to be effective on several MEG simulations of neurological activity as well as data from a self-paced finger tapping experiment.
DOI: 10.1109/tsp.2005.850882
发表时间: 2005-08-01
影响因子: 5.4
作者:
Malioutov, D;Çetin, M;Willsky, AS
通讯作者: Willsky, AS
DOI: 10.1007/s004220050452
发表时间: 1998-06-01
影响因子: 1.9
作者:
Demiralp, T;Ademoglu, A;Gülçür, HO
通讯作者: Gülçür, HO
DOI: 10.1002/cpa.20132
发表时间: 2006-06-01
影响因子: 3
作者:
Donoho, DL
通讯作者: Donoho, DL
DOI: 10.1109/tbme.2006.873743
发表时间: 2006-09-01
影响因子: 4.6
作者:
Limpiti, Tulaya;Van Veen, Barry D.;Wakai, Ronald T.
通讯作者: Wakai, Ronald T.
DOI: 10.1109/10.387200
发表时间: 1995-06-01
影响因子: 4.6
作者:
MATSUURA, K;OKABE, Y
通讯作者: OKABE, Y