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Dear Stephan, The present version of the algorithm involves several rescaling steps so the units are not physically meaningful. You can call them a.u. The exported images are rescaled to total sum of power across time windows and conditions. Best, Vladimir On Thu, Jul 21, 2011 at 8:55 AM, Stephan Moratti <[log in to unmask]> wrote: > Dear all, > I am quite new to SPM8, so sorry for my basic questions. I had a hard time > understanding the source reconstruction in SPM8, but reading the papers and > going through the code I think I have a basic idea now. However, I have some > doubts about the units: > 1.) When I look at the MIP plots, are the estimated responses in Am, nAm (or > Am^2, nAm^2)? What is the unit of the y-axis? My data is MEG data in Tesla. > As J = MY and M is based on the leadfield matrix L, I guess the units are in > Am or nAm (source strength or power). > 2.) What is the unit for a time frequency contrast (y-axis). As it is a > contrast I guess it has no unit ?? > Thanks for your reply and sorry for bothering with these simple questions, > but I could not find these infos in the articles. > Best, > Stephan > > ________________________________________________________ > Stephan Moratti, PhD > > see also: http://web.me.com/smoratti/ > > Universidad Complutense de Madrid > Facultad de Psicología > Departamento de Psicología Básica I > Campus de Somosaguas > 28223 Pozuelo de Alarcón (Madrid) > Spain > and > Center for Biomedical Technology > Laboratory for Cognitive and Computational Neuroscience > Parque Científico y Tecnológico de la Universidad Politecnica de Madrid > Campus Montegancedo > 28223 Pozuelo de Alarcón (Madrid) > Spain > > > email: [log in to unmask] > Tel.: +34 679219982 > > >