[Mne_analysis] Individual Alpha Frequency

[Jasmina Wallace]

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Thank you very much for your advice and your time!
Best wishes,
Jasmina

2018-04-27 19:57 GMT+02:00 Alday, Phillip <Phillip.Alday at mpi.nl>:

> If you just want the PAF or CoG measurements, check out a 'modern'
> perspective (using a very old technique for spectra from chemistry,
> Savitzky-Golay filtering):
>
> Corcoran, A. W., Alday, P. M., Schlesewsky, M., & Bornkessel-Schlesewsky,
> I. (2018). Toward a reliable, automated method of individual alpha
> frequency (IAF) quantification. Psychophysiology, e13064.
> doi:10.1111/psyp.13064
>
> implemented on top of MNE as part of the philistine package:
>
> https://pypi.org/project/philistine/
>
> Extending Marijn's example:
>
> from philistine.mne import savgol_iaf
> help(savgol_iaf)
>
> savgol_iaf(raw)
>
> The Q-factor weighting in the paper isn't yet implemented in Python, so
> all channels are weighted equally.
>
>
> On 27/04/18 18:48, Marijn van Vliet wrote:
>
> Hi Jasmina,
>
> plotting the frequency spectrum, averaged across all electrodes and conditions, is really easy. When you load the data you have a Raw object, for example:
>
> raw = mne.io.read_raw(…)  # the actual function you need to call depends on the dataformat you are using (.fif, .edf, .bdf, something else?)
>
> Then, you can just do:
>
> raw.plot_psd()
>
> Boom! Frequency spectrum :)
>
>
> best,
> Marijn.
>
>
> On 27 Apr 2018, at 12:35, Jasmina Wallace <jasmina.wallace23 at gmail.com> <jasmina.wallace23 at gmail.com> wrote:
>
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>
>
> Hi everyone,
> I am a relative beginner with MNE (and EEG) and I don't know what's the recommended way to analyse the alpha band.
> So, I would like to know if it is recommended to determine the frequency bands of interest for each subject, by highlighting the INDIVIDUAL ALPHA FREQUENCY PEAK (IAF, ref Klimesch, 1999).
> If it is the case, how can I do that? Maybe trought a standard FFT procedure, with the main of define the frequency bin having a maximum power density averaged over all electreodes and conditions in the range from 6 to 14 Hz, in line with the guidelines by Klimesch (1999) ?
>
> Any suggestion are apprecieted!
> Thank you !!!
> Sincerly,
> Jasmina
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