Towards equivalent inhibitory tasks in ERP and fMRI contexts
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1
University of New South Wales, Australia
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2
Monash University, Australia
Aims: The Go/NoGo task has been used for decades to investigate inhibitory capacity in healthy adult controls as well as developmental changes across the lifespan, and in many psychiatric disorders, using neuroscientific techniques such as event-related potentials (ERPs) and functional magnetic resonance imaging (fMRI). fMRI techniques often require a slower presentation of stimuli (about 1 every 3-4 seconds) due to the slow nature of the BOLD response, in comparison to many ERP studies which have a faster presentation rate (about 1 every second). However, recent research has shown that a slow presentation rate makes the task very easy and fails to tax the inhibitory processes of interest.
Methods: In this study, we investigate three sets of feedback parameters designed to be used with a slow (fMRI-like) presentation rate, but to elicit inhibitory processing more similar to a fast (ERP-like) presentation rate. Data collection is ongoing, with data from 80% of the planned sample to be presented at the conference.
Results: Preliminary analyses indicate that will focus on reaction time and error rate, as well as the N2 and P3 components of the event-related potential to NoGo stimuli.
Conclusions: The outcome of the study will be a set of guidelines concerning feedback parameters for fMRI researchers to ensure that they sufficiently tax inhibitory capacity in studies designed to measure this construct.
Keywords:
methods development,
Validation,
inhibition,
Nogo N2,
NoGo P3
Conference:
ASP2017: 27th Annual Meeting for the Australasian Society for Psychophysiology, Parramatta, Australia, 29 Nov - 1 Dec, 2017.
Presentation Type:
Oral Presentation
Topic:
Abstract (General)
Citation:
Smith
JL and
Jamadar
S
(2019). Towards equivalent inhibitory tasks in ERP and fMRI contexts.
Conference Abstract:
ASP2017: 27th Annual Meeting for the Australasian Society for Psychophysiology.
doi: 10.3389/conf.fnhum.2017.224.00020
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Received:
21 Sep 2017;
Published Online:
25 Jan 2019.
*
Correspondence:
Dr. Janette L Smith, University of New South Wales, Kensington, Australia, janette.smith@unsw.edu.au