Dear SPM masters, When performing eeg source inversion, I have the possibility of setting a high-pass filter of 1Hz. What kind of filter is it? Is it dangerous to apply it to e.g. a 500 ms time window (as it would be the case for the typical high-pass filters used in eeg pre-processing)? Thanks, Marco -- Marco Buiatti, PhD CEA/DSV/I2BM / NeuroSpin INSERM U992 - Cognitive Neuroimaging Unit Bāt 145 - Point Courrier 156 Gif sur Yvette F-91191 FRANCE Ph: +33(0)169.08.65.21 Fax: +33(0)169.08.79.73 E-mail: [log in to unmask] http://www.unicog.org/pm/pmwiki.php/Main/MarcoBuiatti ***********************************************