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
>
>
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