[FieldTrip] ft_sourceanalysis - connectivity

[mikkelcv at drcmr.dk]

Dear 이우용

Source.avg.pow is the power of the source in whatever unit the source reconstruction algorithm provide. The length of source.avg.pow should be 8196 representing one value per source point.

How to obtain connectivity between brain regions does not have a straight forward answer. It depends on a lot of different processing steps and decisions, e.g., how you define “brain regions”, what connectivity measure you are interest in, how you do the source reconstruction, etc.. You can take a look at ft_connectivityanalysis to see how and what you can calculate connectivity in FieldTrip. See also the tutorials on FieldTrip website for more detailed how to: https://www.fieldtriptoolbox.org/tutorial/#connectivity-analysis

Best regards
Mikkel

Fra: fieldtrip <fieldtrip-bounces at science.ru.nl> på vegne af via fieldtrip <fieldtrip at science.ru.nl>
Dato: tirsdag, 25. oktober 2022 kl. 05.46
Til: fieldtrip at science.ru.nl <fieldtrip at science.ru.nl>
Cc: 이우용 <luy8357 at naver.com>
Emne: [FieldTrip] ft_sourceanalysis - connectivity

hello, everyone

When using ft_sourceanalysis, (sourcemodel: cortex_8196.surf.gii') If i use the lcmv method or the eloreta method, source.avg.pow is obtained.


As far as I know, I understood that pow represents connectivity between 8196 areas, Is this correct?

And if it is a wrong concept, what method is used to obtain connectivity between regions?

and I was also wondering if there is a way to represent both negative and positive values in representing connectivity.



Thank you and Best Regards
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