Effect of interpolation of 'grad' channels after SSP

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Hi everyone,

I am applying SSP to the meg data, but there are some 'grad' channels are
quite noisy (even after applying interpolation), so normally I exclude them
before applying SSP.

My question remains, is it make sense to interpolate the noisy excluded
'grad' channels after SSP has been done without it and do source
localization on full set of channels? Does new interpolated channels also
contain SSP info like other channels? How does it works in MNE, is there
any example that I can follow?

Regards,
Dip
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hi,

interpolation will be useful for group level sensor space analysis to
make sure all your subjects have the same
sensors available. It would not expect it to help for source space analysis.

what is clear is that you should not compute SSPs on noisy channels.

HTH
Alex

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Thanks!

regards,
Dip