Dear Kyongsik,
There is no such functionality in the 3D GUI because the time courses
of single voxels are generated in SPM from a relatively small number
of spatial and temporal modes so it would not be correct to take time
courses from multiple voxels and analyze them by methods such as
coherence or DCM. So you have several options:
1) If you are interested in the 3D source reconstruction results you
should summarize them as images as described in the manual and analyze
these images using SPM statistics.
2) If you want to do DCM you can use the locations from 3D source
reconstruction as your DCM sources.
3) For any other analyses (e.g. outside SPM) you can use the function
spm_eeg_dipole_waveforms (in the GUI Toolbox/MEEGTools/Extract dipole
waveforms). This functions is present in the most recent SPM update.
Note that you will either have to specify dipole orientations or you
will get 3 waveforms per source and will have to figure out some way
to integrate them (for instance PCA, or summation of time-frequency
plots). Also note that to get better results you should specify all
the active sources.
4) You can also use the function spm_eeg_ft_beamformer_source from
MEEGtools to extract source waveforms using LCMV beamformer.
Best,
Vladimir
On Mon, Jun 8, 2009 at 12:53 PM, Kyongsik Yun<[log in to unmask]> wrote:
> Dear Vladimir,
> Thank you.
> So, how can I extract whole 4D data matrix? (time series of the whole
> voxels)
>
> Sincerely,
> Kyongsik
>
> On Mon, Jun 8, 2009 at 8:13 PM, Vladimir Litvak <[log in to unmask]>
> wrote:
>>
>> Dear Kyongsik,
>>
>> This functionality is no longer there (at least for now). You can get
>> the same results by typing the MNI coordinates of your point of
>> interest in the box with 'ms or mm' written next to it in the 3D
>> source reconstruction window and pressing the 'MIP' button.
>>
>> Best,
>>
>> Vladimir
>>
>> On Sat, Jun 6, 2009 at 6:26 AM, Kyongsik Yun<[log in to unmask]> wrote:
>> > Hi SPM8 MEG users,
>> > I want to use "virtual electrode" to extract the time series data from
>> > the
>> > mesh as specified in the manual (14.8 Rendering interface).
>> > Where is the "virtual electrode" button?
>> > Thank you.
>> > Kyongsik
>> >
>> >
>> >
>> >
>> >
>> > --
>> > _________________________________________________
>> > Kyongsik Yun
>> > Ph.D. Candidate
>> > --------------------------------------------------------------------
>> > Brain Dynamics Laboratory
>> > Department of Bio and Brain Engineering
>> > Korea Advanced Institute of Science & Technology (KAIST)
>> > Daejeon, 305-701 South Korea
>> > Office: +82-42-350-4359 Mobile: 016-726-9409
>> > Fax: +82-42-350-4310 Email: [log in to unmask]
>> > _________________________________________________
>> >
>
>
>
> --
> _________________________________________________
> Kyongsik Yun
> Ph.D. Candidate
> --------------------------------------------------------------------
> Brain Dynamics Laboratory
> Department of Bio and Brain Engineering
> Korea Advanced Institute of Science & Technology (KAIST)
> Daejeon, 305-701 South Korea
> Office: +82-42-350-4359 Mobile: 016-726-9409
> Fax: +82-42-350-4310 Email: [log in to unmask]
> _________________________________________________
>
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