simulation of a dataset with multiple dipoles

[Florian Ph.S Fischmeister]

Litvak Vladimir <litvak at TECHUNIX.TECHNION.AC.IL> writes:

> Hi,
>
> You may find the free dipole simulator written by Patrick Berg
> helpful. It can be downloaded from:
>
> ftp://ftp.besa.de/free_tools/DipoleSimulator-2004-11-19-Install.exe
>
> You can simulate there ERPs and also raw data with any dipole
> configuration you like and then convert it to format that Fieldtrip
> can look at.

Thanks Vladimir,

I already tried the Besa simulator. Using the dipolesimulator I can only
generate data with 150 timepoint. My problem is, that I want to
simulate slow cortical potentials having trials of 10 sec length and
more.

best,

Florian

>
> On Thu, 28 Jul 2005, Florian Ph.S Fischmeister wrote:
>
>> Dear Experts,
>>
>> I am trying to simulate an EEG dataset containing multiple dipoles. I do
>> understand, that I can have a single dipole with a different moment and
>> time course per trial using cell-arrays. But how can I obtain multiple
>> dipoles? Is it correct to simulate one dataset per dipol and than sum
>> the different datasets?
>>
>> Currently I am using a 4 spherical shell model with
>>  cfg.vol.r = [71 72 79 85];
>>  cfg.vol.c = [0.3300 1 0.0042 0.3300];
>>  cfg.vol.o = [0 0 0];
>> taken from EEGLAB.
>>
>> What are the correct steps to obtain a BEM forward head-model based on an MRI
>> for an individual electrode setting for dipolesimulation.
>>
>> Finaly, I want to check the simulation using the dipolefitting routine
>> included in fieldtrip. Could you please provide some information on how
>> the appropriate cfg should look like.
>>
>>
>> Thanks in advance,
>>
>> Florian
>>
>> --
>> Florian Ph.S Fischmeister 	eMail: Florian.Fischmeister at univie.ac.at
>> Brain Research Laboratory	University of Vienna
>> Faculty of Psychology		Liebiggasse 5
>> Tel: +43-(0)1-4277-478-37	A-1010 Vienna, Austria
>> Fax: +43-(0)1-4277-479-39       AT43:+43-(0)59966-4-47837
>>
>

--
Florian Ph.S Fischmeister 	eMail: Florian.Fischmeister at univie.ac.at
Brain Research Laboratory	University of Vienna
Faculty of Psychology		Liebiggasse 5
Tel: +43-(0)1-4277-478-37	A-1010 Vienna, Austria
Fax: +43-(0)1-4277-479-39       AT43:+43-(0)59966-4-47837