[Eeglablist] CSD maps in STUDY design

[Marco Montalto]

Dear Arno,

Thank you for your reply and for all the information you have supplied me with. I just have two questions:

1) Can I use this code if I precompute measures in STUDY design for power spectrum?

2) I have three conditions in STUDY design. How do I produce CSD maps for each condition?

Thanks once again and looking forward to your reply.

Regards,
Marco

On 19 Jan 2013, at 02:59, Arnaud Delorme <arno at ucsd.edu> wrote:

> Dear Marco,
> 
> based on another email I sent earlier to the list.
> 
> % merge all channel location structures for the STUDY
> mergelocs = eeg_mergelocs(ALLEEG.chanlocs);
>  
> % get ERSP results (scalp maps) - for example scalp topography of spectrum in the alpha band
> [STUDY spec ] = std_specplot(STUDY,ALLEEG,'channels', { mergelocs.labels }, 'topofreq', [8 12]);
> 
> then you may use one of the many laplacian function eeg_laplac.m is a good one although you will have to rebuild a dataset to use it. Something like
> 
> TMP = EEG(1);
> TMP.chanlocs = mergelocs;
> TMP.data = squeeze(spec{1});
> CSD = eeg_laplac(TMP, 1);
> 
> % plot average CSD scalp topography
> average_CSD = mean(CSD,2); % average across subjects
> figure; topoplot(average_CSD, mergelocs);
> 
> Best,
> 
> Arno
> 
> <Screen Shot 2013-01-18 at 17.58.30.png>
> 
> On 17 Jan 2013, at 13:56, Marco Montalto wrote:
> 
>> Dear List,
>> 
>> Is there a way of producing CSD (current source density) maps in EEGLAB, in a STUDY design?
>> 
>> Marco Montalto
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