Reconfiguration of functional brain networks and metabolic cost converge during task performance.

ELife
Andreas HahnLuca Cocchi

Abstract

The ability to solve cognitive tasks depends upon adaptive changes in the organization of whole-brain functional networks. However, the link between task-induced network reconfigurations and their underlying energy demands is poorly understood. We address this by multimodal network analyses integrating functional and molecular neuroimaging acquired concurrently during a complex cognitive task. Task engagement elicited a marked increase in the association between glucose consumption and functional brain network reorganization. This convergence between metabolic and neural processes was specific to feedforward connections linking the visual and dorsal attention networks, in accordance with task requirements of visuo-spatial reasoning. Further increases in cognitive load above initial task engagement did not affect the relationship between metabolism and network reorganization but only modulated existing interactions. Our findings show how the upregulation of key computational mechanisms to support cognitive performance unveils the complex, interdependent changes in neural metabolism and neuro-vascular responses.

Associated Clinical Trials

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Citations

Oct 23, 2020·Scientific Data·Sharna D JamadarGary F Egan
Jun 4, 2021·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·Lucas RischkaAndreas Hahn

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BETA
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imaging techniques
pregnancy test

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MCM
SPM12
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CMRGlu
DCM
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