[Mne_analysis] maxfilter for head movement compensation only

[Marijn van Vliet]

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Hi Evgenii,

you’ll find that compensating head movement will spread the noise from bad channels to other channels. Best to be bad channel rejection *before* head movement compensation.

best,
Marijn.

> On 5 May 2019, at 11:17, Evgenii Kalenkovich <e.kalenkovich at gmail.com> wrote:
> 
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> 
> 
> Dear all,
> 
> I would like to use maxfilter for head movement compensation only and skip the filtering bits.
> 
> There are two parts to this as I understand: head position extraction and the actual compensation. I have several overlapping questions about both parts.
> 	• Head position extraction using Electa's MaxFilter
> 		• Is this step sensitive to noisy/flat channels if I only need head position?
> 		• Is it necessary/advised to use -cal and -ctc files for this purpose?
> 	• Head movement compensation using mne-python's maxwell_filter
> 		• Is this step sensitive to noisy/flat channels if I only do movement compensation?
> 		• Is it necessary/advised to use the fine calibration and cross-talk cancellation files for this?
> 		• What parameters should I supply to maxwell_filter to limit it to head movement compensation?
> The reason I don't want the filtering done by MaxFilter/maxwell_filter is that I would like to avoid manually selecting bad channels. Which, in turn, I want to avoid to keep the analysis reproducible on new data. I remove bad channels/epochs at a later stage using the autoreject package.
> 
> Thank you for any advice,
> Evgenii
> 
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