Influence of (Neuromag) gradiometer orientation on interpolation and adjacency matrix

Hey everyone,

I am wondering whether the orientation of the gradiometer in Neuromag MEG systems is relevant for interpolating bad sensors, and if so, whether mne is taking the orientation into account.

As far as I understand, activity at differently oriented gradiometers at the same position should cancel each other out to some extent (depending on the angle), so that activity at a given position shouldn’t just be interpolated with a weighted averaged activity of surrounding sensors without considering respective orientations. Or am I missing anything?

Also, is the orientation of the gradiometers relevant when creating the adjacency matrix for cluster-based permutation testing, or is in that case only the neighborhood structure, that is relative positioning, relevant?


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Little bump here. Has anyone some thoughts on that topic?