Tziortzi, AC, Haber, SN, Searle, GE et al. (9 more authors) (2014) Connectivity-based functional analysis of dopamine release in the striatum using diffusion-weighted MRI and positron emission tomography. Cerebral Cortex, 24 (5). 1165 - 1177. ISSN 1047-3211
Abstract
The striatum acts in conjunction with the cortex to control and execute functions that are impaired by abnormal dopamine neurotransmission in disorders such as Parkinson's and schizophrenia. To date, in vivo quantification of striatal dopamine has been restricted to structure-based striatal subdivisions. Here, we present a multimodal imaging approach that quantifies the endogenous dopamine release following the administration of d-amphetamine in the functional subdivisions of the striatum of healthy humans with [(11)C]PHNO and [(11)C]Raclopride positron emission tomography ligands. Using connectivity-based (CB) parcellation, we subdivided the striatum into functional subregions based on striato-cortical anatomical connectivity information derived from diffusion magnetic resonance imaging (MRI) and probabilistic tractography. Our parcellation showed that the functional organization of the striatum was spatially coherent across individuals, congruent with primate data and previous diffusion MRI studies, with distinctive and overlapping networks. d-amphetamine induced the highest dopamine release in the limbic followed by the sensory, motor, and executive areas. The data suggest that the relative regional proportions of D2-like receptors are unlikely to be responsible for this regional dopamine release pattern. Notably, the homogeneity of dopamine release was significantly higher within the CB functional subdivisions in comparison with the structural subdivisions. These results support an association between local levels of dopamine release and cortical connectivity fingerprints.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author 2013. Published by Oxford University Press. All rights reserved. This is an author produced version of a paper published in Cerebral Cortex. Uploaded in accordance with the publisher's self-archiving policy |
Keywords: | Diffusion-weighted image; Dopamine receptors; Positron emission tomography; Probabilistic tractography; Striatum; Adult; Brain Mapping; Corpus Striatum; Diffusion Tensor Imaging; Dopamine; Dopamine Antagonists; Executive Function; Humans; Male; Middle Aged; Nerve Net; Positron-Emission Tomography; Probability; Raclopride |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Sep 2015 08:24 |
Last Modified: | 12 Apr 2017 16:48 |
Published Version: | http://dx.doi.org/10.1093/cercor/bhs397 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/cercor/bhs397 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:88660 |