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Cereb Cortex. 2017 Jan 1;27(1):485-495. doi: 10.1093/cercor/bhv243.

Dopaminergic Modulation of the Functional Ventrodorsal Architecture of the Human Striatum.

Author information

1
Donders Institute for Brain Cognition and Behaviour, Centre for Cognitive Neuroimaging, Radboud University, Nijmegen, The Netherlands.
2
Department of Psychiatry, Radboud University Medical Center, Nijmegen, The Netherlands.

Abstract

Interactions between motivational, cognitive, and motor regions of the striatum are crucial for implementing behavioral control. Work with experimental animals indicates that such interactions are sensitive to modulation by dopamine. Using systematic pharmacological manipulation of dopamine D2-receptors and resting-state functional imaging, we defined the functional architecture of the human striatum and quantified the effects of dopaminergic drugs on intrinsic effective connectivity between striatal subregions. We found that dopamine modulates interactions between motivational and cognitive regions, as well cognitive and motor regions of the striatum. Stimulation and blockade of the dopamine D2-receptor had opposite (increasing and decreasing) effects on the efficacy of those interactions. Furthermore, trait impulsivity was specifically associated with dopaminergic modulation of ventral-to-dorsal striatal connectivity. Individuals with high trait impulsivity exhibited greater drug-induced increases (after stimulation) and decreases (after blockade) of ventral-to-dorsal striatal connectivity than those with low trait impulsivity. These observations establish a key link between dopamine, intrinsic effective connectivity between striatal subregions, and trait impulsivity.

KEYWORDS:

connectivity; dopamine; functional magnetic resonance imaging; impulsivity

PMID:
26494799
DOI:
10.1093/cercor/bhv243
[Indexed for MEDLINE]

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