Abstract:
:A new procedure to model extended cortical sources from EEG and MEG recordings based on a probabilistic approach is presented. The method (SPMECS) was implemented within the framework of maximum likelihood estimators. Neuronal activity generating EEG or MEG signals was characterized by the number of sources and their location and extension. Based on the noise distribution of the measured data, source configurations were associated with the according value of the likelihood function. To find the most likely source, i.e., the maximum likelihood estimator, and its level of confidence, a stochastic solver (Metropolis algorithm) was applied. The method presented supports the incorporation of virtually any constraint, e.g., based on physiological and anatomical a priori knowledge. Thus, ambiguity of the ill-posed inverse problem was reduced considerably by confining sources to the cortical surface extracted from individual MR images. The influence of different levels and types of noise on the outcome was investigated by means of simulations. Somatosensory evoked magnetic fields analyzed by the method presented suggest that larger extended cortical areas are involved in the processing of combined finger stimulation as compared to single finger stimulation.
journal_name
Hum Brain Mappjournal_title
Human brain mappingauthors
Kincses WE,Braun C,Kaiser S,Grodd W,Ackermann H,Mathiak Kdoi
10.1002/hbm.10079keywords:
subject
Has Abstractpub_date
2003-02-01 00:00:00pages
100-10issue
2eissn
1065-9471issn
1097-0193journal_volume
18pub_type
杂志文章abstract::There is still no clear consensus as to which of the many functional and structural changes in the brain in schizophrenia are of most importance, although the main focus to date has been on those in the frontal and cingulate cortices. In the present study, we have used a novel holistic approach to identify brain-wide ...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22162
更新日期:2014-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22242
更新日期:2014-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23452
更新日期:2017-03-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22446
更新日期:2014-08-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23860
更新日期:2018-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22086
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journal_title:Human brain mapping
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24797
更新日期:2020-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
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journal_title:Human brain mapping
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24015
更新日期:2018-06-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24502
更新日期:2019-04-15 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.25323
更新日期:2020-12-19 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23574
更新日期:2017-06-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22201
更新日期:2014-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22890
更新日期:2015-10-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20204
更新日期:2006-07-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22164
更新日期:2014-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23130
更新日期:2016-05-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22847
更新日期:2015-08-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22207
更新日期:2014-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22199
更新日期:2014-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20409
更新日期:2008-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22255
更新日期:2014-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21004
更新日期:2011-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21099
更新日期:2011-07-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21100
更新日期:2011-08-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20501
更新日期:2009-01-01 00:00:00