= Tutorial: Import and review recordings =
== Dataset description ==
You should already have downloaded this package if you have done correctly the previous tutorial. If it is not the case, go back to the [[Tutorials/TutImportAnatomy|previous tutorial]] and follow all the instructions.
||<tablewidth="100%"style="vertical-align: top;">File: ||'''bst_tutorial_somatotopy_ctf.zip''' ||
||<style="vertical-align: top;">Acquisition system: ||CTF MEG, 151 axial gradiometers, La Salpetriere Hospital, Paris ||
||<style="vertical-align: top;">Protocol: ||Shuffled electrical stimulations of the thumb fingers from both hands. The idea is to get a map of the primary sensory response on the cortex ||
||<style="vertical-align: top;">Author: ||Data provided courtesy of Sabine Meunier ||
||<style="vertical-align: top;">Anatomy directory: ||T1-MRI of the subject in CTF format (.mri) ||
||<style="vertical-align: top;"> ||Cortex and head surfaces extracted with BrainVISA software ||
||<style="vertical-align: top;">somMGYO-18av.ds: ||average response for the stimulation of the right thumb (one subject, 400 trials) ||
||<style="vertical-align: top;">somMDYO-18av.ds: ||average response for the stimulation of the left thumb (one subject, 400 trials) ||
||<style="vertical-align: top;">Observations: ||Stimulus occurs at time 0. There's a first tiny wave occuring at about 20ms or so but it's not too clear on all fingers. So if you are to compute cortical maps, start by the 40ms peak which is also of interest and which has much better SNR. ||




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