Healthy Volunteer Protocol

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Revision as of 11:37, 30 April 2020 by Jstout (talk | contribs) (Oddball Task Added)
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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


BIDS format / OpenNeuro

All data is be converted to BIDS format and uploaded to OpenNeuro as an open access dataset. 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.


 pyctf - core interface to CTF processing in python.  Includes general bids related functions as well as general purpose MEG processing and MEG/MRI alignment.
 hv_proc - Scripts for bids creation and QA of the datasets

Trigger Coding

Oddball Task

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)

Hariri Hammer

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)


Processing Scripts:

 Files have been compiled into a folder hv_proc
 This contains script interfaces into the megblocks package