Graph analysis uncovers an opposing impact of methylphenidate on connectivity patterns within default mode network sub-divisions.
Humans
Methylphenidate
/ pharmacology
Adult
Male
Magnetic Resonance Imaging
/ methods
Female
Central Nervous System Stimulants
/ pharmacology
Default Mode Network
/ drug effects
Young Adult
Double-Blind Method
Nerve Net
/ drug effects
Impulsive Behavior
/ drug effects
Connectome
/ methods
Brain
/ drug effects
Neural Pathways
/ drug effects
Default mode network (DMN)
Functional connectivity
Graph modularity analysis
Impulsivity
Methylphenidate (MPH)
Resting-state functional MRI (rs-fMRI)
Journal
Behavioral and brain functions : BBF
ISSN: 1744-9081
Titre abrégé: Behav Brain Funct
Pays: England
ID NLM: 101245751
Informations de publication
Date de publication:
20 Jun 2024
20 Jun 2024
Historique:
received:
22
10
2023
accepted:
13
06
2024
medline:
21
6
2024
pubmed:
21
6
2024
entrez:
20
6
2024
Statut:
epublish
Résumé
The Default Mode Network (DMN) is a central neural network, with recent evidence indicating that it is composed of functionally distinct sub-networks. Methylphenidate (MPH) administration has been shown before to modulate impulsive behavior, though it is not yet clear whether these effects relate to MPH-induced changes in DMN connectivity. To address this gap, we assessed the impact of MPH administration on functional connectivity patterns within and between distinct DMN sub-networks and tested putative relations to variability in sub-scales of impulsivity. Fifty-five right-handed healthy adults underwent two resting-state functional MRI (rs-fMRI) scans, following acute administration of either MPH (20 mg) or placebo, via a randomized double-blind placebo-controlled design. Graph modularity analysis was implemented to fractionate the DMN into distinct sub-networks based on the impact of MPH (vs. placebo) on DMN connectivity patterns with other neural networks. MPH administration led to an overall decreased DMN connectivity, particularly with the auditory, cinguloopercular, and somatomotor networks, and increased connectivity with the parietomedial network. Graph analysis revealed that the DMN could be fractionated into two distinct sub-networks, with one exhibiting MPH-induced increased connectivity and the other decreased connectivity. Decreased connectivity of the DMN sub-network with the cinguloopercular network following MPH administration was associated with elevated impulsivity and non-planning impulsiveness. Current findings highlight the intricate effects of MPH administration on DMN rs-fMRI connectivity, uncovering its opposing impact on distinct DMN sub-divisions. MPH-induced dynamics in DMN connectivity patterns with other neural networks may account for some of the effects of MPH administration on impulsive behavior.
Sections du résumé
BACKGROUND
BACKGROUND
The Default Mode Network (DMN) is a central neural network, with recent evidence indicating that it is composed of functionally distinct sub-networks. Methylphenidate (MPH) administration has been shown before to modulate impulsive behavior, though it is not yet clear whether these effects relate to MPH-induced changes in DMN connectivity. To address this gap, we assessed the impact of MPH administration on functional connectivity patterns within and between distinct DMN sub-networks and tested putative relations to variability in sub-scales of impulsivity.
METHODS
METHODS
Fifty-five right-handed healthy adults underwent two resting-state functional MRI (rs-fMRI) scans, following acute administration of either MPH (20 mg) or placebo, via a randomized double-blind placebo-controlled design. Graph modularity analysis was implemented to fractionate the DMN into distinct sub-networks based on the impact of MPH (vs. placebo) on DMN connectivity patterns with other neural networks.
RESULTS
RESULTS
MPH administration led to an overall decreased DMN connectivity, particularly with the auditory, cinguloopercular, and somatomotor networks, and increased connectivity with the parietomedial network. Graph analysis revealed that the DMN could be fractionated into two distinct sub-networks, with one exhibiting MPH-induced increased connectivity and the other decreased connectivity. Decreased connectivity of the DMN sub-network with the cinguloopercular network following MPH administration was associated with elevated impulsivity and non-planning impulsiveness.
CONCLUSION
CONCLUSIONS
Current findings highlight the intricate effects of MPH administration on DMN rs-fMRI connectivity, uncovering its opposing impact on distinct DMN sub-divisions. MPH-induced dynamics in DMN connectivity patterns with other neural networks may account for some of the effects of MPH administration on impulsive behavior.
Identifiants
pubmed: 38902791
doi: 10.1186/s12993-024-00242-1
pii: 10.1186/s12993-024-00242-1
doi:
Substances chimiques
Methylphenidate
207ZZ9QZ49
Central Nervous System Stimulants
0
Types de publication
Journal Article
Randomized Controlled Trial
Langues
eng
Sous-ensembles de citation
IM
Pagination
15Subventions
Organisme : Israel Science Foundation
ID : 1806/16
Informations de copyright
© 2024. The Author(s).
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