Journal Article

FZJ-2022-04504

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Meditation-induced effects on whole-brain structural and effective connectivity

De Filippi, E. (Corresponding author) ; Escrichs, A. ; Càmara, E. ; Garrido, C. ; Marins, T. ; Sánchez-Fibla, M. ; Gilson, M.FZJ* ; Deco, G.

2022
Springer Heidelberg

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Please use a persistent id in citations: http://hdl.handle.net/2128/32884  doi:10.1007/s00429-022-02496-9

Abstract: In the past decades, there has been a growing scientific interest in characterizing neural correlates of meditation training. Nonetheless, the mechanisms underlying meditation remain elusive. In the present work, we investigated meditation-related changes in functional dynamics and structural connectivity (SC). For this purpose, we scanned experienced meditators and control (naive) subjects using magnetic resonance imaging (MRI) to acquire structural and functional data during two conditions, resting-state and meditation (focused attention on breathing). In this way, we aimed to characterize and distinguish both short-term and long-term modifications in the brain’s structure and function. First, to analyze the fMRI data, we calculated whole-brain effective connectivity (EC) estimates, relying on a dynamical network model to replicate BOLD signals’ spatio-temporal structure, akin to functional connectivity (FC) with lagged correlations. We compared the estimated EC, FC, and SC links as features to train classifiers to predict behavioral conditions and group identity. Then, we performed a network-based analysis of anatomical connectivity. We demonstrated through a machine-learning approach that EC features were more informative than FC and SC solely. We showed that the most informative EC links that discriminated between meditators and controls involved several large-scale networks mainly within the left hemisphere. Moreover, we found that differences in the functional domain were reflected to a smaller extent in changes at the anatomical level as well. The network-based analysis of anatomical pathways revealed strengthened connectivity for meditators compared to controls between four areas in the left hemisphere belonging to the somatomotor, dorsal attention, subcortical and visual networks. Overall, the results of our whole-brain model-based approach revealed a mechanism underlying meditation by providing causal relationships at the structure-function level.

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Contributing Institute(s):

1. Computational and Systems Neuroscience (INM-6)
2. Jara-Institut Brain structure-function relationships (INM-10)
3. Theoretical Neuroscience (IAS-6)

Research Program(s):

1. 5232 - Computational Principles (POF4-523) (POF4-523)
2. SDS005 - Towards an integrated data science of complex natural systems (PF-JARA-SDS005) (PF-JARA-SDS005)
3. HBP SGA3 - Human Brain Project Specific Grant Agreement 3 (945539) (945539)

Appears in the scientific report 2022

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Database coverage:
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