Dynamic state allocation for MEG source reconstruction.
Dynamic state allocation for MEG source reconstruction.
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DOI:
10.1016/j.neuroimage.2013.03.036
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发表时间:
2013-08-15
期刊:
影响因子:
5.7
通讯作者:
Rezek, Iead
中科院分区:
文献类型:
--
作者:
Woolrich, Mark W.;Baker, Adam;Luckhoo, Henry;Mohseni, Hamid;Barnes, Gareth;Brookes, Matthew;Rezek, Iead
Our understanding of the dynamics of neuronal activity in the human brain remains limited, due in part to a lack of adequate methods for reconstructing neuronal activity from noninvasive electrophysiological data. Here, we present a novel adaptive time-varying approach to source reconstruction that can be applied to magnetoencephalography (MEG) and electroencephalography (EEG) data. The method is underpinned by a Hidden Markov Model (HMM), which infers the points in time when particular states re-occur in the sensor space data. HMM inference finds short-lived states on the scale of 100 ms. Intriguingly, this is on the same timescale as EEG microstates. The resulting state time courses can be used to intelligently pool data over these distinct and short-lived periods in time. This is used to compute time-varying data covariance matrices for use in beamforming, resulting in a source reconstruction approach that can tune its spatial filtering properties to those required at different points in time. Proof of principle is demonstrated with simulated data, and we demonstrate improvements when the method is applied to MEG. Novel adaptive time-varying approach to MEG source reconstruction HMM infers reoccurring short-lived states on the same scale as EEG microstates Tunes source reconstruction properties to those needed at different points in time Improves spatial localisation of high temporal resolution information from MEG data
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影响因子:
5.7
作者:
Luckhoo, H.;Hale, J. R.;Stokes, M. G.;Nobre, A. C.;Morris, P. G.;Brookes, M. J.;Woolrich, M. W.
通讯作者:
Woolrich, M. W.
影响因子:
5.7
作者:
Britz, Juliane;Van De Ville, Dimitri;Michel, Christoph M.
通讯作者:
Michel, Christoph M.
影响因子:
5.7
作者:
Friston, Karl J.;Harrison, Lee;Mattout, Jeremie
通讯作者:
Mattout, Jeremie
DOI:
10.1098/rstb.2005.1649
发表时间:
2005-05-29
影响因子:
6.3
作者:
Koenig, T;Studer, D;Strik, WK
通讯作者:
Strik, WK
影响因子:
25
作者:
Hunt, Laurence T.;Kolling, Nils;Soltani, Alireza;Woolrich, Mark W.;Rushworth, Matthew F. S.;Behrens, Timothy E. J.
通讯作者:
Behrens, Timothy E. J.