[Mne_analysis] Theta/Alpha band induced power
rezvan.farahi at gmail.com
Tue Nov 22 05:57:13 EST 2016
Yes, hadn't cropped this example.
But my point concerns the first reason you mentioned. However, I would have
thought that the peak spreading won't include prestimulus times this
obviously and made me think that perhaps this is due to the implementation.
Thanks a lot for reassuring that this looks normal to you.
On Tuesday, November 22, 2016, Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr> wrote:
> 2 things:
> - you loose temporal resolution by looking at frequency content. In
> other words, the peak will spread
> in time (backward and forward)
> - the mne code does not fix edge artifacts. So you need to crop the
> output to get rid of it, depending
> on the number of cycles you used.
> On Tue, Nov 22, 2016 at 4:40 AM, Rezvan Farahi <rezvan.farahi at gmail.com
> > Hi all,
> > A quick question, in the whole brain induced power computation on the
> > example dataset (below), I wodered if the onset of the main peak is
> > 0ms.
> > http://martinos.org/mne/stable/auto_examples/time_
> > So, tested lower frequency bands (theta 4-8Hz and alpha 8-12Hz) the
> > of which is attached. It seems as if the onset of the main peak of theta
> > starts around -50ms and alpha -30ms. Was wondering if someone might have
> > thoughts on this (as looks a bit odd to me)?
> > Thanks
> > Rezvan
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