[Eeglablist] CSD maps in STUDY design

[Arnaud Delorme]

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



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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