Disrupted resting-state brain functional network in methamphetamine abusers: A brain source space study by EEG

PLoS One. 2019 Dec 11;14(12):e0226249. doi: 10.1371/journal.pone.0226249. eCollection 2019.

Abstract

This study aimed to examine the effects of chronic methamphetamine use on the topological organization of whole-brain functional connectivity network (FCN) by reconstruction of neural-activity time series at resting-state. The EEG of 36 individuals with methamphetamine use disorder (IWMUD) and 24 normal controls (NCs) were recorded, pre-processed and source-reconstructed using standardized low-resolution tomography (sLORETA). The brain FCNs of participants were constructed and between-group differences in network topological properties were investigated using graph theoretical analysis. IWMUD showed decreased characteristic path length, increased clustering coefficient and small-world index at delta and gamma frequency bands compared to NCs. Moreover, abnormal changes in inter-regional connectivity and network hubs were observed in all the frequency bands. The results suggest that the IWMUD and NCs have distinct FCNs at all the frequency bands, particularly at the delta and gamma bands, in which deviated small-world brain topology was found in IWMUD.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Amphetamine-Related Disorders / metabolism
  • Amphetamine-Related Disorders / pathology*
  • Anxiety / complications
  • Anxiety / pathology
  • Brain / physiopathology*
  • Brain Mapping
  • Brain Waves
  • Depression / complications
  • Depression / pathology
  • Electroencephalography*
  • Female
  • Humans
  • Male
  • Rest / physiology*
  • Signal Processing, Computer-Assisted
  • Statistics, Nonparametric
  • Stress, Psychological
  • Young Adult

Grants and funding

This work was supported in part by Tehran University of Medical Sciences (TUMS) (https://www.tums.ac.ir/?lang=en), project grant No. of 95-02-30-32441, and also by Cognitive Sciences and Technologies Council (CSTC) (http://cogc.ir/?lang=2) grant No. of 4517 to BM. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.