Aberrant default-mode functional and structural connectivity in heroin-dependent individuals.
BACKGROUND:Little is known about connectivity within the default mode network (DMN) in heroin-dependent individuals (HDIs). In the current study, diffusion-tensor imaging (DTI) and resting-state functional MRI (rs-fMRI) were combined to investigate both structural and functional connectivity within...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2015-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4393019?pdf=render |
| _version_ | 1818433280468320256 |
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| author | Xiaofen Ma Yingwei Qiu Junzhang Tian Jinhui Wang Shumei Li Wenfeng Zhan Tianyue Wang Shaoqing Zeng Guihua Jiang Yikai Xu |
| author_facet | Xiaofen Ma Yingwei Qiu Junzhang Tian Jinhui Wang Shumei Li Wenfeng Zhan Tianyue Wang Shaoqing Zeng Guihua Jiang Yikai Xu |
| author_sort | Xiaofen Ma |
| collection | DOAJ |
| description | BACKGROUND:Little is known about connectivity within the default mode network (DMN) in heroin-dependent individuals (HDIs). In the current study, diffusion-tensor imaging (DTI) and resting-state functional MRI (rs-fMRI) were combined to investigate both structural and functional connectivity within the DMN in HDIs. METHODS:Fourteen HDIs and 14 controls participated in the study. Structural (path length, tracts count, (fractional anisotropy) FA and (mean diffusivity) MD derived from DTI tractography)and functional (temporal correlation coefficient derived from rs-fMRI) DMN connectivity changes were examined in HDIs. Pearson correlation analysis was performed to compare the structural/functional indices and duration of heroin use/Iowa gambling task(IGT) performance in HDIs. RESULTS:HDIs had lower FA and higher MD in the tract connecting the posterior cingulate cortex/precuneus (PCC/PCUN) to right parahippocampal gyrus (PHG), compared to the controls. HDIs also had decreased FA and track count in the tract connecting the PCC/PCUN and medial prefrontal cortex (MPFC), as well as decreased functional connectivity between the PCC/PCUN and bilateral PHG and MPFC, compared to controls. FA values for the tract connecting PCC/PCUN to the right PHG and connecting PCC/PCUN to the MPFC were negatively correlated to the duration of heroin use. The temporal correlation coefficients between the PCC/PCUN and the MPFC, and the FA values for the tract connecting the PCC/PCUN to the MPFC were positively correlated to IGT performance in HDIs. CONCLUSIONS:Structural and functional connectivity within the DMN are both disturbed in HDIs. This disturbance progresses as duration of heroin use increases and is related to deficits in decision making in HDIs. |
| first_indexed | 2024-12-14T16:18:35Z |
| format | Article |
| id | doaj.art-1d9010f71f1246358e9c1ee7bbac4dcc |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-14T16:18:35Z |
| publishDate | 2015-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-1d9010f71f1246358e9c1ee7bbac4dcc2022-12-21T22:54:52ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01104e012086110.1371/journal.pone.0120861Aberrant default-mode functional and structural connectivity in heroin-dependent individuals.Xiaofen MaYingwei QiuJunzhang TianJinhui WangShumei LiWenfeng ZhanTianyue WangShaoqing ZengGuihua JiangYikai XuBACKGROUND:Little is known about connectivity within the default mode network (DMN) in heroin-dependent individuals (HDIs). In the current study, diffusion-tensor imaging (DTI) and resting-state functional MRI (rs-fMRI) were combined to investigate both structural and functional connectivity within the DMN in HDIs. METHODS:Fourteen HDIs and 14 controls participated in the study. Structural (path length, tracts count, (fractional anisotropy) FA and (mean diffusivity) MD derived from DTI tractography)and functional (temporal correlation coefficient derived from rs-fMRI) DMN connectivity changes were examined in HDIs. Pearson correlation analysis was performed to compare the structural/functional indices and duration of heroin use/Iowa gambling task(IGT) performance in HDIs. RESULTS:HDIs had lower FA and higher MD in the tract connecting the posterior cingulate cortex/precuneus (PCC/PCUN) to right parahippocampal gyrus (PHG), compared to the controls. HDIs also had decreased FA and track count in the tract connecting the PCC/PCUN and medial prefrontal cortex (MPFC), as well as decreased functional connectivity between the PCC/PCUN and bilateral PHG and MPFC, compared to controls. FA values for the tract connecting PCC/PCUN to the right PHG and connecting PCC/PCUN to the MPFC were negatively correlated to the duration of heroin use. The temporal correlation coefficients between the PCC/PCUN and the MPFC, and the FA values for the tract connecting the PCC/PCUN to the MPFC were positively correlated to IGT performance in HDIs. CONCLUSIONS:Structural and functional connectivity within the DMN are both disturbed in HDIs. This disturbance progresses as duration of heroin use increases and is related to deficits in decision making in HDIs.http://europepmc.org/articles/PMC4393019?pdf=render |
| spellingShingle | Xiaofen Ma Yingwei Qiu Junzhang Tian Jinhui Wang Shumei Li Wenfeng Zhan Tianyue Wang Shaoqing Zeng Guihua Jiang Yikai Xu Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. PLoS ONE |
| title | Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. |
| title_full | Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. |
| title_fullStr | Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. |
| title_full_unstemmed | Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. |
| title_short | Aberrant default-mode functional and structural connectivity in heroin-dependent individuals. |
| title_sort | aberrant default mode functional and structural connectivity in heroin dependent individuals |
| url | http://europepmc.org/articles/PMC4393019?pdf=render |
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