SCIENCE@home

Disentangling common from specific processing across tasks using task potency

R. Chauvin,M. Mennes,A. Llera,J. Buitelaar,C. Beckmann

Published 2019 in NeuroImage

ABSTRACT

&NA; When an individual engages in a task, the associated evoked activities build upon already ongoing activity, shaped by an underlying functional connectivity baseline (Fox et al., 2009; Smith et al., 2009; Tavor et al., 2016). Building on the idea that rest represents the brain's full functional repertoire, we here incorporate the idea that task‐induced functional connectivity modulations ought to be task‐specific with respect to their underlying resting state functional connectivity. Various metrics such as clustering coefficient or average path length have been proposed to index processing efficiency, typically from single fMRI session data. We introduce a framework incorporating task potency, which provides direct access to task‐specificity by enabling direct comparison between task paradigms. In particular, to study functional connectivity modulations related to cognitive involvement in a task we define task potency as the amplitude of a connectivity modulation away from its baseline functional connectivity architecture as observed during a resting state acquisition. We demonstrate the use of our framework by comparing three tasks (visuo‐spatial working memory, reward processing, and stop signal task) available within a large cohort. Using task potency, we demonstrate that cognitive operations are supported by a set of common within‐network interactions, supplemented by connections between large‐scale networks in order to solve a specific task. HighlightsTask potency framework defines modulation of functional connectivity relative to resting state baseline.Task potency enables direct task comparison in terms of the amplitude of connectivity modulations.Task performance induces more within‐compared to between‐network modulations.Edges commonly modulated by multiple tasks are mostly within‐network.

PUBLICATION RECORD

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-74 of 74 references · Page 1 of 1

CITED BY

Showing 1-16 of 16 citing papers · Page 1 of 1