[FieldTrip] Neighborhood of voxels in the volume source space

[Schoffelen, J.M. (Jan Mathijs)]

Hi Lin,

The answer to your question depends on the topology of the source space.
If the dipole positions are defined on a regular 3D grid, the neighbourhood is implicit in their order.
If the dipole positions are defined on a cortical mesh (that includes a triangulation), the neighbourhood can be determined from the triangulation.

Best wishes,
Jan-Mathijs


On 18 Mar 2021, at 01:59, Lin Wang <wanglinsisi at gmail.com<mailto:wanglinsisi at gmail.com>> wrote:

Hi field excerpts,

I'd like to implement a searchlight type of multivariate analysis in the MEG source localized data, but I don’t know where to find the information about neighboring voxels for each voxel.

I guess this is also relevant to the definition of the neighborhood when conducting cluster-based permutation tests in the source space.

Could anyone help me?

Thank you very much!
Lin
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