The objectives for this tutorial are to reproduce the analysis presented in the following documents: The forward model is the same for all the runs within one subject, therefore it can be computed for the first run and copied to all the other runs. ![]() To be able to use this information efficiently we should estimate the sources for each run separately, then average the sources across runs. We have computed different SSP projectors and selected different bad channels for each acquisition run. This doesn't mean we can estimate the sources only once per subject. However, it is not reliable to average MEG recordings across subjects, because of the anatomical differences between subjects. This means we can safely average or compare the MEG sensor values across runs within one subject. When the runs are not aligned, it looks like this. The surfaces representing the MEG helmet are perfectly overlapping for all the runs. THE SOFTWARE IS PROVIDED "AS IS," AND THEĢ3 % UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANYĢ4 % WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OFĢ5 % MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANYĢ6 % LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.Ģ8 % For more information type "brainstorm license" at command prompt.ģ1 % Author: Francois Tadel, Elizabeth Bock, 2016-2018ģ9 if (nargin Display sensors > MEG (all). Further details on the GPLv3Ģ2 % FOR RESEARCH PURPOSES ONLY. This protocol TutorialGroup is produced from the single subject protocol TutorialVisual with the script: brainstorm3/toolbox/script/tutorial_visual_copy.mġ function tutorial_visual_copy(ProtocolNameSingle, ProtocolNameGroup, reports_dir)Ģ % TUTORIAL_VISUAL_COPY: Copy the subject averages for the Brainstorm/SPM group tutorial into a new protocol (BIDS VERSION)ĩ % - ProtocolNameSingle : Name of the protocol created with all the data imported (TutorialVisual)ġ0 % - ProtocolNameGroup : Name of the protocol with just the averages, downsampled to 275Hz (TutorialGroup)ġ1 % - reports_dir : If defined, exports all the reports as HTML to this folderġ2 13 % % This function is part of the Brainstorm software:ġ7 % Copyright (c) University of Southern California & McGill Universityġ8 % This software is distributed under the terms of the GNU General Public Licenseġ9 % as published by the Free Software Foundation. The forward model, noise covariance and inverse models for each subject and each run.
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