Hi Colline,
> I would like to use SPM5 for
> analyzing bird fMRI data. As the heamodynamic response is not the same than in
> mammals, I would like to model the BOLD response with a simple box-car (not
> convoluted with hrf) and to do this using the GUI. It worked well with SPM99
> but this option is not available in SPM5.
try 'Finite Impulse Response' as basis function, with a vary short window length of, let say 0.1 (0 will not work) and order of 1. That should give you almost that what you would like to have.
Good luck,
Karsten
--
-------------------------------------------------------------
Karsten Specht, PhD
Department of Biological and Medical Psychology
& National Competence Centre for functional MRI
University of Bergen
Jonas Lies vei 91
5009 Bergen
Norway
Tel.: +47-555-86279
Fax: +47-555-89872
[log in to unmask]
http://fmri.uib.no/
|