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Dear Ele, If you use something like MSP inversion which gives you a sparse solution with a few sources then those sources would be dominated by the strong visual responses you have but also all the noise at baseline and after the stimulus would be projected on them. So I wouldn't over-interpret the fact that you get some flickering of occipital sources long after the stimulus. The proper way to discover any effects is to do stats. Best, Vladimir On Mon, Feb 6, 2017 at 3:48 PM, Elenaz < [log in to unmask]> wrote: > Dear SPM experts, > I have a question regarding the option of render at SPM12. My data being > recorded by visual stimulation. so when I choose render option at source > localization (GUI) step, Occipital being fired from (0-1200 mili second). I > can't find any resean why it is fired aftar 400 mili second? > I will be a lot appreciated to guide me. > Many thanks, > Ele > > Sent from my iPhone