Altered Insula Connectivity under MDMA.
Neuropsychopharmacology
; 42(11): 2152-2162, 2017 Oct.
Article
em En
| MEDLINE
| ID: mdl-28195139
ABSTRACT
Recent work with noninvasive human brain imaging has started to investigate the effects of 3,4-methylenedioxymethamphetamine (MDMA) on large-scale patterns of brain activity. MDMA, a potent monoamine-releaser with particularly pronounced serotonin- releasing properties, has unique subjective effects that include marked positive mood, pleasant/unusual bodily sensations and pro-social, empathic feelings. However, the neurobiological basis for these effects is not properly understood, and the present analysis sought to address this knowledge gap. To do this, we administered MDMA-HCl (100 mg p.o.) and, separately, placebo (ascorbic acid) in a randomized, double-blind, repeated-measures design with twenty-five healthy volunteers undergoing fMRI scanning. We then employed a measure of global resting-state functional brain connectivity and follow-up seed-to-voxel analysis to the fMRI data we acquired. Results revealed decreased right insula/salience network functional connectivity under MDMA. Furthermore, these decreases in right insula/salience network connectivity correlated with baseline trait anxiety and acute experiences of altered bodily sensations under MDMA. The present findings highlight insular disintegration (ie, compromised salience network membership) as a neurobiological signature of the MDMA experience, and relate this brain effect to trait anxiety and acutely altered bodily sensations-both of which are known to be associated with insular functioning.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Córtex Cerebral
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N-Metil-3,4-Metilenodioxianfetamina
/
Alucinógenos
/
Rede Nervosa
Tipo de estudo:
Clinical_trials
/
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Neuropsychopharmacology
Assunto da revista:
NEUROLOGIA
/
PSICOFARMACOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Canadá