[Eeglablist] Dealing with a noisy TP10 channel for re-referencing (average TP9-TP10)

Cedric Cannard ccannard at protonmail.com
Thu Feb 11 15:17:23 PST 2021


Hi Boki,

Either remove that subject from the analysis if you really want to do mastoids referencing for the group. Or I would recommend removing your artifactual TP10 channel for that subject, interpolate from neighboring channels, and re-reference with REST/infinity as it is better than AR with less channels (see
https://urldefense.com/v3/__https://link.springer.com/article/10.1007/s10548-019-00707-x__;!!Mih3wA!WHyRTHC-n__fKsKIa5rST_kQN5GScVtwkWY1khmBK2-zKbNNBzc9SkLI1V7VczdJhguNqg$ ).
You can download the REST plugin through the EEGLAB GUI. I don't think the command line is available for REST so you have to do it through the GUI in the Tools tab once installed.

And you'd have to use the same referencing method for all your participants of course if you choose this method.

Cedric

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, February 10, 2021 5:25 PM, Boki Wang <pwang91 at asu.edu> wrote:

> Hi list,
>
> I am new to (pre)-processing of resting-state EEG data. I am using a 32
> channel system, where the reference electrode is the right earlobe. During
> offline analysis, I would re-reference the data to average mastoids
> (average of TP9 and TP10).
>
> But the TP10 channel for one of the participants is contaminated by noise,
> so much so that the power spectrum doesn't look like 1/f function, but a
> NIKE logo where power for frequencies of 12Hz and beyond starts increasing
> (hope this makes sense). I don't think it's appropriate to use the data
> from this channel for re-referencing.
>
> In this case, what's the best thing to do for re-referencing? Can I
> interpolate TP10 electrode and still use the interpolated data for
> re-referencing? Or, if I remove this electrode and use average reference
> (which isn't great for 32 channel data either right?), can I process this
> participants' data with everyone else's?
>
> Would appreciate any pointers!
>
> Thank you!
>
> Boki
>
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