source localization methods

💬 Support & Discussions
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1

Hello
why are some of the source localization method such as:

  • Hierarchical Bayes (Gamma-MAP) sparse source localization method
  • RAP-MUSIC source localization method
    only available for ERPs and evoked data, and how can i use them for resting state eeg data

thanks for your attention

2

these methods assume stationarity in the source locations. Basically the location is not
evolving with time

Do you know any work where they have been used for rest data?

Alex

1 Like
3

thank you @agramfort for your attention

so these methods wouldn’t return the STC (Source Time Courses) of the defined source space as their output?

4

Yes it can output stc. It is not really a software problem but more a model issue as those methods assume that the dipole locations are fixed over time which is a strong assumption for long signals

Alex

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5

thank you @agramfort

sorry if i have hard time understanding their difference.
isn’t the assumption of stationary sources also true for minimum norm methods?
i am currently trying to get STC of the source space for a period of like 2 seconds.

BTW, may i ask some technical question, i was wondering if the time length of my EEG input would have an impact on the accuracy of the localized sources?