Healthy Volunteer Protocol
Healthy Volunteer Protocol - MEG component
This large scale study is being conducted to collect MEG on a large number of healthy controls with matched MRI/fMRI data The study is described in full detail in the manuscript: __Enter Link Here__
BIDS format / OpenNeuro
All data is be converted to BIDS format and uploaded to OpenNeuro as an open access dataset. https://openneuro.org/ Data triggers are cleaned using several routines listed below. These have been used to realign stimulus triggers to optical onset of the projector. Datasets that have logfiles have been merged with the trigger data to label triggers and responses.
Information on data preprocessing prior to upload: https://megcore.nih.gov/index.php/Healthy_Volunteer_Protocol_Upload_Process
Information on Tasks
*Airpuff: Airpuff based somatosensory stimuli *Sternberg: Working memory task with 4 and 6 letter memory items presented visually *Hariri: Modified hariri hammer emotional processing task with positive and negative facial emotions and a subsequent emotional match *Movie: Naturalistic viewing task - "Growth" (Groei) https://www.imdb.com/title/tt6386160/ *Resting: Eyes closed resting state *Oddball: Auditory oddball identification task with standard tone, oddball target tone, and white noise distractor tone *Go/No-go: Visually presented go no-go with flanking distractors
Description: 3 sound stimuli presented to the participant. The participant attends to the "standard" tone stimuli (210 epochs) and is required to respond to the "target" tone stimuli (45 epochs) that are intermixed with the standard tone. Additionally a broadband noise stimuli is presented as a "distractor" stimuli (45 epochs).
UADC003 - Left Ear auditory stimuli UADC004 - Right Ear auditory stimuli UADC005 - Participant response UPPT001 - Stimuli Coding (standard:1, target:2, distractor:3)
Emotional processing task contrasting happy and sad faces. Shapes are used as neutral baselines. An initial "top stim" will be shown followed by a fixation crosshair. The subject is supposed to respond during the "choice stim" by pressing the left or right response button that corresponds to the face matching the "top stim" presentation.
UADC006 - Left response UADC007 - Right response UADC016 - Projector onset UPPT001 - Parallel port stimuli
Temporal Coding (UPPT001)
Top Stim Choice Stim Response Value
Stimulus Trigger codes (UPPT001)
diamond,0x1 moon,0x2 oval,0x3 plus,0x4 rectangle,0x5 trapezoid,0x6 triangle,0x7 hapmale,0xB hapfem,0xC sadmale,0x15 sadfem,0x16
Go / NoGo
A series of words are presented on the screen with ..........
Stimulus Trigger Codes (UPPT001)
1 Go 2 Nogo
A two level working memory task with either 4 or 6 letters visually presented to the subject in a single encode stimuli. A subsequent probe slide has a single letter that the subject will respond with the left response (UADC00--) if the probe letter is in the original encode set or (UADC00--) if the subject believes that the probe letter was not in the origal encode set.