[Mne_analysis] preprocessing/ICA: movement artifacts vs blinks

[Alexandre Gramfort]

one more thing. If the movement artifacts can get mapped to strong peak-to-peak
amplitudes the reject param in ICA can certainly help automatically
excluding these
segments from the ICA fit.

Alex

On Tue, Mar 14, 2017 at 3:18 PM, Eric Larson <larson.eric.d at gmail.com> wrote:
>> My approach is to fit ICA on the epochs as I want to analyze them, and use
>> ica.plot_properties to inspect every component and manually identify the
>> EOG-related components. This is usually very easy to do based on scalp
>> distribution, variance, and the epochs raster plots (and easy to teach
>> undergrads to reliably identify as well).
>
>
> Assuming the movement artifacts are much bigger than the blinks, I wonder if
> this suggestion be adapted to this use case with something like:
>
> 1. Use `make_fixed_length_events` to make regularly-spaced events of some
> duration (not sure if e.g., 1 sec or 10 sec would work better)
> 2. Create Epochs using a rejection threshold that throws away epochs based
> on movement artifacts, but not the blink artifacts.
> 3. Run ICA on the Epochs.
>
> Eric
>
>
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