LORETA - what file

[Robert Oostenveld]

On 11 Feb 2009, at 16:24, Szymon Piłat wrote:
> Hi everybody!
>
> Is LORETA implemented in FieldTrip? I would like to localize source  
> using it.
> I want to find source using only 1 timepoint of EEG (19 electrodes)  
> so I want to use low-level script. Can you tell me what file  
> performs LORETA's algorithm?

Hi Szymon

Note that there are various LORETA algoritms, which are distinguished  
by a prefix (e.g. sLORETA, eLORETA). The original one with Laplacian- 
weighted regularization is plain LORETA without a prefix. But  
Fieldtrip does not include an implementation of any LORETA version.

An implementation of LORETA for EEG is available from Roberto Pascual- 
Marqui at http://www.uzh.ch/keyinst/loreta.htm. Fieldtrip does have a  
helper function to read the resulting files from thaht software, it is  
called loreta2fieldtrip. It can be used for post-processing the source  
reconstructions in fieldtrip, e.g. for statistics. I think that it has  
not been used for a long time, so I am not 100% confident that  
loreta2fieldtrip will work out of the box, but you could have a look  
at it.

best regards,
Robert 
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