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Changes in functional connectivity of ventral anterior cingulate cortex in heroin abusers
Wei Wang1, Ya-rong Wang, Wei Qin
1Molecular Imaging Center, First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shannxi 710061, China.
Chinese Medical Journal
|September 8, 2010
Summary
Heroin abuse impairs brain connectivity, particularly in the ventral anterior cingulate cortex (vACC). This study found reduced functional connectivity in heroin users compared to controls, highlighting addiction
Area of Science:
- Neuroscience
- Addiction Research
- Neuroimaging
Background:
- Previous research indicates impaired brain functional connectivity in addicts via various methods.
- Structural and functional MRI studies confirm these alterations.
Purpose of the Study:
- To investigate alterations in resting-state functional connectivity of the ventral anterior cingulate cortex (vACC) in heroin abusers.
- To identify specific brain regions with altered connectivity to the vACC in this population.
Main Methods:
- Utilized resting-state functional magnetic resonance imaging (fMRI) on 15 heroin abusers and 15 healthy controls.
- Employed a region-of-interest (ROI) seed-based correlation analysis focusing on the vACC.
- Data acquired using a 3.0 T scanner with T2*-weighted GRE-EPI sequence and processed with SPM5 software.
Main Results:
- Heroin abusers exhibited altered functional connectivity with the insula and vACC.
- Significantly decreased functional connectivity was observed between the nucleus accumbens (NAc), parahippocampal gyrus/amygdala (PHC/amygdala), thalamus, and posterior cingulate cortex/precuneus (PCC/pC) with the vACC in heroin users compared to controls.
Conclusions:
- Altered resting-state functional connectivity involving the vACC suggests disruption of neural circuitry affected by addictive drugs.
- These findings reflect the underlying brain dysfunction associated with heroin addiction.
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