min-norm

[Robert Oostenveld]

Hi Sreenivasan,

There are different source analysis options implemented in FieldTrip,
namely LCMV, DICS and single or multiple spatiotemporal dipole fitting.
Minimum current or minimum norm solutions based on a distributed source
model are not implemented.

Ii principle implementing a minimum norm solution would be very easy,
but it is quite difficult to implement a good regularization method.
Furthermore, implementing a good and robust distributed source model
(based on the cortical surface) is quite some work.

best regards,
Robert


On 16 Nov 2004, at 16:47, R. Sreenivasan wrote:

> Hi Robert,
>
> I understand that the Fieldtrip uses LCMV method for source analysis.
> Do you
> have any routine(s) that uses min-norm option?
>
> Thank you
> Sreenivasan
>
----------------------------------------------------------------------
Robert Oostenveld, PhD
Center for Sensory-Motor Interaction (SMI)
Aalborg University, Denmark

and

F.C. Donders Centre for Cognitive Neuroimaging
University Nijmegen
P.O. Box 9101
NL-6500 AH Nijmegen
The Netherlands

Tel: +31 (0)24 3619695
Fax: +31 (0)24 3610989
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