#pragma section-numbers on [[FsFastTutorialV6.0|top]] | [[FsFastTutorialV6.0|previous]]| [[FsFastTutorialV6.0/FsFastDirStruct|next (Directory Structure)]] <> = FSFAST Tutorial Data Description = The functional data were collected as part of the Functional Biomedical Research Network (fBIRN). * Working-memory paradigm with distractors * 18 subjects * Each subject has 1 run (except sess01 which has 4 runs) * Collected at MGH Bay 4 (3T Siemens) * !FreeSurfer anatomical analyses = Functional Paradigm = The paradigm was designed to study the effects of emotional stimuli on the ability to recall items stored in working memory. * Block design * Each block consisted of 3 phases 1. Encode (16 sec) - 8 stick figures to remember (no response) 1. Distractor (16 sec) - 8 distractor images (response whether there is a face in the image) a. Emotional - Distractors are emotionally disturbing a. Neutral - Distractors are emotionally neutral 1. Probe (16 sec) - 8 pairs of stick figures. Subject responds as to which of the pair was in the original Encode. * Between each block was a 16 sec scrambled image used as baseline. {{attachment:wmparadigm.jpg}} <
> The above yields 5 conditions: 1. Encode 1. Emotional Distractor 1. Neutral Distractor 1. Probe following Emotional Distractor 1. Probe following Neutral Distractor The scrambled image will be modeled as a baseline, not as a condition. = Functional Data = * Original data: each subject had 8 runs * This data: each subject has 1 run (except for sess01 who has 4) * Each run lasts 142 time points * TR = 2 sec. * There is one run of rest data for 13 subjects * There is a B0 map for each subject = Anatomical Data = * !FreeSurfer analysis has been run for all 18 subjects '''If you are at a !FreeSurfer Course, continue on to the next page now''' <
><
> [[FsFastTutorialV6.0|top]] | [[FsFastTutorialV6.0|previous]]| [[FsFastTutorialV6.0/FsFastDirStruct|next (Directory Structure)]] ------- = Getting the Data (not necessary for the Boston FreeSurfer Course) = You can install the freesurfer tutorial data via instructions [[https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Data|here]]. Afterwards, you will need to set the TUTORIAL_DATA environment variable. In bash: {{{ export TUTORIAL_DATA=/path/to/tutorial_data }}} You will also need to link the !FreeSurfer anatomical subjects (data in fsfast-tutorial.subjects) into your $SUBJECTS_DIR. You should set the FSFAST output format to be compressed NIFTI (nii.gz): {{{ export FSF_OUTPUT_FORMAT=nii.gz }}} [[FsFastTutorialV6.0|top]] | [[FsFastTutorialV6.0|previous]]| [[FsFastTutorialV6.0/FsFastDirStruct|next (Directory Structure)]]