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• W2004240610 abstract "Substantia nigra/ventral tegmental area (SN/VTA) subregions, defined by dopaminergic projections to the striatum, are differentially affected by health (e.g. normal aging) and disease (e.g. Parkinson's disease). This may have an impact on reward processing which relies on dopaminergic regions and circuits. We acquired diffusion tensor imaging (DTI) with probabilistic tractography in 30 healthy older adults to determine whether subregions of the SN/VTA could be delineated based on anatomical connectivity to the striatum. We found that a dorsomedial region of the SN/VTA preferentially connected to the ventral striatum whereas a more ventrolateral region connected to the dorsal striatum. These SN/VTA subregions could be characterised by differences in quantitative structural imaging parameters, suggesting different underlying tissue properties. We also observed that these connectivity patterns differentially mapped onto reward dependence personality trait. We show that tractography can be used to parcellate the SN/VTA into anatomically plausible and behaviourally meaningful compartments, an approach that may help future studies to provide a more fine-grained synopsis of pathological changes in the dopaminergic midbrain and their functional impact. • We use DTI to segment the substantia nigra/ventral tegmental area (SN/VTA). • Dorsomedial and ventrolateral SN/VTA regions were defined by striatal connectivity. • R2* and fractional anisotropy values differed between SN/VTA subregions. • Connectivity patterns differentially mapped onto a reward personality trait." @default.
• W2004240610 created "2016-06-24" @default.
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• W2004240610 creator A5028897058 @default.
• W2004240610 date "2013-11-01" @default.
• W2004240610 modified "2023-10-16" @default.
• W2004240610 title "Parcellation of the human substantia nigra based on anatomical connectivity to the striatum" @default.
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• W2004240610 doi "https://doi.org/10.1016/j.neuroimage.2013.05.043" @default.
• W2004240610 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3734352" @default.
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