= MEG median nerve dataset - CTF = ''File: sample_raw.zip'' <)>> == License == This tutorial dataset (EEG and MRI data) remains a property of the MEG Lab, McConnell Brain Imaging Center, Montreal Neurological Institute, McGill University, Canada. Its use and transfer outside the Brainstorm tutorial, e.g. for research purposes, is prohibited without written consent from the MEG Lab. If you reference this dataset in your publications, please acknowledge its authors (Elizabeth Bock, Esther Florin, Francois Tadel and Sylvain Baillet) and cite Brainstorm as indicated on the [[CiteBrainstorm|website]]. For questions, please contact us through the forum. == Presentation of the experiment == ==== Experiment ==== * One subject, one acquisition runs of 6 minutes * Subject stimulated using [???] * The run contains 200 electric stimulations randomly distributed between left and right: * 102 stimulations of the left hand * 98 stimulations of the right hand * Inter-stimulus interval: [???] * Stimuli generated using [???] ==== MEG acquisition ==== * Acquisition at '''1200Hz''', with a '''CTF 275''' system, subject in seating position * Recorded at the Montreal Neurological Institute in November 2011 * Online anti-aliasing low-pass filter at 300Hz, files saved with the 3rd order gradient * Recorded channels (302): * 1 Stim channel indicating the presentation times of the stimuli: UPPT001 (#1) * 26 MEG reference sensors (#3-#28) * 272 MEG axial gradiometers (#29-#300) * 1 ECG bipolar (#301) * 1 vertical EOG bipolar (#302) * 1 Unused channels (#2) * 1 dataset:''' subj001_somatosensory_20111109_01_AUX-f.ds''' ==== Stimulation delays ==== * '''Delay #1''':[???] ==== Head shape and fiducial points ==== * 3D digitization using a Polhemus Fastrak device ('''subj00111092011.pos''') * Position of the anatomical references used for these recordings: <
> The position of the CTF head localization coils, pictures available in file '''fiducials.jpg''' * Around 110 head points distributed on the hard parts of the head (no soft tissues) ==== Subject anatomy ==== * Subject with 1.5T MRI * Processed with FreeSurfer 5.2 <)>> == Tutorials using this dataset == * [[Tutorials/MedianNerveCtf|MEG median nerve (CTF)]]