Increasing the accuracy of electromagnetic inverses using functional area source correlation constraints.
Increasing the accuracy of electromagnetic inverses using functional area source correlation constraints.
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DOI:
10.1002/hbm.21394
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发表时间:
2012-11
影响因子:
4.8
通讯作者:
Norcia, Anthony M.
中科院分区:
文献类型:
--
作者:
Cottereau, Benoit R.;Ales, Justin M.;Norcia, Anthony M.
Estimating cortical current distributions from electroencephalographic (EEG) or magnetoencephalographic (MEG) data is a difficult inverse problem whose solution can be improved by the addition of priors on the associated neural responses. In the context of visual activation studies, we propose a new approach that uses a functional area constrained estimator (FACE) to increase the accuracy of the reconstructions. It derives the source correlation matrix from a segmentation of the cortex into areas defined by retinotopic maps of the visual field or by functional localizers obtained independently by fMRI. These areas are computed once for each individual subject and the associated estimators can therefore be re-used for any new study on the same participant. The resulting FACE reconstructions emphasize the activity of sources within these areas or enforce their inter-correlations. We used realistic Monte-Carlo simulations to demonstrate that this approach improved our estimates of a diverse set of source configurations. Reconstructions obtained from a real EEG dataset demonstrate that our priors improve the localization of the cortical areas involved in horizontal disparity processing.
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影响因子:
5.7
作者:
Hinds O;Polimeni JR;Rajendran N;Balasubramanian M;Amunts K;Zilles K;Schwartz EL;Fischl B;Triantafyllou C
通讯作者:
Triantafyllou C
影响因子:
--
作者:
Bullier, J
通讯作者:
Bullier, J
影响因子:
5.7
作者:
Friston, Karl J.;Harrison, Lee;Mattout, Jeremie
通讯作者:
Mattout, Jeremie
DOI:
10.1523/jneurosci.3795-10.2011
发表时间:
2011-01-19
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Cottereau BR;McKee SP;Ales JM;Norcia AM
通讯作者:
Norcia AM
影响因子:
44.1
作者:
HAMALAINEN, M;HARI, R;LOUNASMAA, OV
通讯作者:
LOUNASMAA, OV