[FieldTrip] source-level cluster analysis?

[Ladanyi, Eniko]

Thank you, Paolo! This is very helpful!

Best,

Eniko


*********************

Eniko Ladanyi, Ph.D.

Postdoctoral Fellow

Vanderbilt University Medical Center

Music Cognition Lab

https://enikoladanyi.com/

________________________________
From: fieldtrip <fieldtrip-bounces at science.ru.nl> on behalf of Paolo Belardinelli <paolo.belardinelli at gmail.com>
Sent: Thursday, March 4, 2021 2:02 PM
To: FieldTrip discussion list <fieldtrip at science.ru.nl>
Subject: Re: [FieldTrip] source-level cluster analysis?

Hi Eniko.

You might check this out:

https://www.fieldtriptoolbox.org/example/source_statistics/<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fieldtriptoolbox.org%2Fexample%2Fsource_statistics%2F&data=04%7C01%7Ceniko.ladanyi%40vumc.org%7C7ca941d103a64bf0927108d8df4894c0%7Cef57503014244ed8b83c12c533d879ab%7C0%7C1%7C637504850130270558%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=L5FRsfjl29oIrmwRFat9KKi39qRYTXgQ4%2F3HvZrIEuU%3D&reserved=0>

I would add that in my experience a strong significance at sensor does not imply a significance at source.

Best wishes,

Paolo

On Thu, Mar 4, 2021 at 8:13 PM Ladanyi, Eniko <eniko.ladanyi at vumc.org<mailto:eniko.ladanyi at vumc.org>> wrote:

Hi all,



I am analyzing an MEG dataset in which I only have access to source-level data. I ran cluster-based permutation tests on the data with pre-defined ROI-s but I was wondering if it would make sense not to pre-define ROI-s but search for spatial clusters with a cluster-based permutation test. I’m not familiar enough with MEG, so I can’t decide if the features of source-level data would allow me to run the cluster analysis the same way described here for sensor-level data: https://www.fieldtriptoolbox.org/tutorial/cluster_permutation_freq/<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fieldtriptoolbox.org%2Ftutorial%2Fcluster_permutation_freq%2F&data=04%7C01%7Ceniko.ladanyi%40vumc.org%7C7ca941d103a64bf0927108d8df4894c0%7Cef57503014244ed8b83c12c533d879ab%7C0%7C1%7C637504850130280553%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Jm36KzjU6sa3kvQApqvd%2FZXW2iKK%2FN6Fz1jaIOiQyfQ%3D&reserved=0>.



Would cluster-based permutation test work as well with source-level data as with sensor-level data? If so, what kind of layout file should I use? Positions of sensors/electrodes can be defined with two coordinates but sources can be only defined with three coordinates.



Thanks so much in advance for any advice!



Best,



Eniko



*********************

Eniko Ladanyi, Ph.D.

Postdoctoral Fellow

Vanderbilt University Medical Center

Music Cognition Lab

https://enikoladanyi.com/<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fenikoladanyi.com%2F&data=04%7C01%7Ceniko.ladanyi%40vumc.org%7C7ca941d103a64bf0927108d8df4894c0%7Cef57503014244ed8b83c12c533d879ab%7C0%7C1%7C637504850130280553%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=vgFBBWzYjFNEmvaPvhr3ThOH7QMyNn%2BLNaKT0zGyfBA%3D&reserved=0>

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