Abnormal gray matter volume and resting-state functional connectivity in former heroin-dependent individuals abstinent for multiple years

Addiction Biology
Lubin WangZheng Yang

Abstract

Previous studies have suggested that heroin addiction is associated with structural and functional brain abnormalities. However, it is largely unknown whether these characteristics of brain abnormalities would be persistent or restored after long periods of abstinence. Considering the very high rates of relapse, we hypothesized that there may exist some latent neural vulnerabilities in abstinent heroin users. In this study, structural and resting-state functional magnetic resonance imaging data were collected from 30 former heroin-dependent (FHD) subjects who were drug free for more than 3 years and 30 non-addicted control (CN) volunteers. Voxel-based morphometry was used to identify possible gray matter volume differences between the FHD and CN groups. Alterations in resting-state functional connectivity in FHD were examined using brain areas with gray matter deficits as seed regions. Significantly reduced gray matter volume was observed in FHD in an area surrounding the parieto-occipital sulcus, which included the precuneus and cuneus. Functional connectivity analyses revealed that the FHD subjects showed reduced positive correlation within the default mode network and visual network and decreased negative correlation between...Continue Reading

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Jun 25, 2016·Journal of Magnetic Resonance Imaging : JMRI·Ying-Wei QiuJun-Zhang Tian
Nov 4, 2016·The American Journal of Drug and Alcohol Abuse·Scott C WollmanJoaquim Radua
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Jul 7, 2021·Addiction·Katherine Herlinger, Anne Lingford-Hughes

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