Source reconstruction

[Jan Mathijs Schoffelen]

Dear Juan,

You can create time-courses of your sources by using the lcmv-method of
sourceanalysis. The input to sourceanalysis should be a timelock-structure
which has been obtained with cfg.keeptrials = 'yes'
The easiest way to reconstruct your single-trial source time-courses would
be to specify cfg.keepfilter = 'yes' in your sourceanalysis-configuration.
In the output of sourceanalysis you will find the field avg.filter, which
contains the filter weights of your locations of interest.
You can obtain a single-trial estimate of your source activation at a
particular location by multiplying your data with the filter-weights as
follows:

source.avg.filter{i}*squeeze(timelock.trial(j,:,:))

This will give you the reconstructed source activity in trial j at location
i.

Yours,

Jan-Mathijs

-----Original Message-----
From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf
Of Juan Civeira
Sent: Friday, May 12, 2006 12:26 PM
To: FIELDTRIP at NIC.SURFNET.NL
Subject: [FIELDTRIP] Source reconstruction

Hello,

I have already localize an activation in the brain and now I want to
calculate time course of the selected sources.

I have thought about chosing the sources by hand and then programming the
time reconstruction but I would like to ask if there is any code to make it.

Thank you

Juan Civeira
Neurociencias - Lab. Neurofisiologia de Sistemas
Fundacion para la Investigacion Medica Aplicada
Edificio CIMA
Pio XII, 55 31080 Pamplona (Spain)
http://www.unav.es/cima