Hi Vladimir,
Thanks so much for your detailed response. I am now able to generate the
script for the 3D head model. My follow up question to you is, where exactly
should I insert it in the eye blink correction routine?
Currently the eye blink removal section of the script looks like the
following:
% Eye Blink Correction
S = [];
S.D = fullname6;
S.method = 'SVD';
S.timewin = [-0.498
2];
S.ncomp = 2;
D = spm_eeg_spatial_confounds(S);
save(D);
S = [];
S.D = fullname6;
S.correction = 'Berg';
D = spm_eeg_correct_sensor_data(S);
save (D);
Where should I insert the 3D Head modelling script?
Thanks
- Muhammad
On Tue, Nov 30, 2010 at 5:54 AM, Vladimir Litvak
<[log in to unmask]>wrote:
> Dear Muhammad,
>
> Press the 'Batch' button, go to SPM->M/EEG->M/EEG Source
> reconstruction->M/EEG head model specification
>
> Then you need to specify the configuration. The parameters are the
> same as in 3D source reconstruction window. Once you specify a
> complete configuration that can run (the triangle at the top turns
> grin) you can go to File->Save batch as script and save your
> configuration as an .m file. You can then modify the code if necessary
> and add it to your script.
>
> Best,
>
> Vladimir
>
>
> On Mon, Nov 29, 2010 at 6:47 PM, MP <[log in to unmask]> wrote:
> > Hi Vladimir,
> > Many thanks for your help. Could you please guide how can I pre-compute
> the
> > head model for my dataset using SPM batch tool? I want to do this so that
> I
> > can include the eye-blink correction using Berg algorithm in a script.
> > Thanks,
> > - Muhammad
> >
> > On Sat, Nov 13, 2010 at 7:48 AM, Vladimir Litvak <
> [log in to unmask]>
> > wrote:
> >>
> >> Dear Muhammad,
> >>
> >> On Sat, Nov 13, 2010 at 3:46 AM, MP <[log in to unmask]> wrote:
> >> > Hello all,
> >> > I am doing eye-blink correction through Berg algorithm. I have a
> couple
> >> > of
> >> > questions in this regard:
> >> > 1. Once the data has been run through the Berg algorithm, is the
> output
> >> > data
> >> > corrected for the eye-blinks, or is there anything that needs to be
> >> > done?
> >>
> >> If you've done everything correctly the data is corrected. If it's
> >> continuous data you could average it around eyeblinks again to make
> >> sure they are gone.
> >>
> >> > 2. While running the Berg algorithm, a prompt comes up asking "Which
> >> > Head
> >> > Model?" for the MEEG/MRI coregistration. Which script is this prompt
> >> > coming
> >> > from?
> >>
> >> Head model is necessary for the 'Berg' option (but not for SSP)
> >> because Berg algorithm uses lead fields of cortical sources. If you
> >> want to batch it you can pre-compute the head model for your dataset
> >> using the batch tool before correcting it.
> >>
> >> > 3. How does the Berg algorithm affect the spectral information in the
> >> > data?
> >> > Is it OK to do TF-decomposition and then stat analysis on this data?
> >>
> >> In principle it is OK, but it depends on the question and the data so
> >> you should still be careful. The principles of this correction are
> >> very similar to those of ICA and ICA is very frequently used for
> >> removing eye blinks prior to all kinds of analyses so you can use the
> >> ICA literature as a precedent. In any case perhaps you should repeat
> >> your analysis with and without eye blink correction and convince
> >> yourself that the differences you see can be attributed to eye blink
> >> removal.
> >>
> >> Best,
> >>
> >> Vladimir
> >>
> >>
> >> > Thanks
> >> > - Muhammad
> >> >
> >> >
> >> > On Fri, Nov 12, 2010 at 12:08 PM, Vladimir Litvak
> >> > <[log in to unmask]> wrote:
> >> >>
> >> >> No, this function is used for detecting eyeblinks in continuous data
> >> >> as part of eyeblink correction procedure. See
> >> >>
> >> >> https://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=SPM;adf47ab2.1007
> >> >>
> >> >> Vladimir
> >> >>
> >> >> On Fri, Nov 12, 2010 at 5:02 PM, MP <[log in to unmask]> wrote:
> >> >> > Hi all,
> >> >> > It may be a very naive question, but does
> >> >> > 'spm_eeg_detect_eyeblinks' remove
> >> >> > the eye-blinks after detecting them?
> >> >> > Thanks
> >> >> > - Muhammad
> >> >
> >> >
> >
> >
>
