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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