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Updated: Sep 15, 2025

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Amygdala Network Dynamics During Drug Cue Processing in Methamphetamine Use Disorder.

Peyman Ghobadi-Azbari1, Hossein Moslemi1, Mitra Yousefpour2

  • 1Department of Science and Technology Studies, Faculty of Faculty of Neuroscience, AJA University of Command and Staff, Tehran, Iran.

Basic and Clinical Neuroscience
|July 18, 2025
PubMed
Summary

This study found increased amygdala-cortical connectivity in individuals with methamphetamine use disorder when exposed to drug cues. This highlights key neural pathways involved in addiction and craving.

Keywords:
Addiction neuroscienceCravingCue reactivityDynamic causal modeling (DCM)Functional magnetic resonance imaging (fMRI)Generalized psychophysiological interaction (gPPI)Methamphetamine use disorder (MUD)

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Area of Science:

  • Neuroscience
  • Addiction Research
  • Psychiatry

Background:

  • Methamphetamine use disorder (MUD) presents significant societal and individual challenges.
  • Understanding the neural underpinnings of MUD is crucial for developing effective interventions.
  • The amygdala and prefrontal cortex play key roles in emotion processing, reward, and addictive behaviors.

Purpose of the Study:

  • To investigate amygdala-cortical connectivity during methamphetamine cue reactivity in individuals with MUD.
  • To identify effective neural pathways implicated in addiction and craving.
  • To explore neuro-behavioral correlations related to MUD.

Main Methods:

  • Study included 54 males with MUD (ages 22-44).
  • Utilized generalized psychophysiological interaction (gPPI) and dynamic causal modeling (DCM) for connectivity analysis.
  • Pearson correlation and group factor analysis (GFA) were employed for neuro-behavioral assessments.

Main Results:

  • Increased functional connectivity observed between the amygdala and posterior cingulate cortex (PCC) and dorsolateral prefrontal cortex (dlPFC) during cue reactivity.
  • DCM revealed a network with positive bidirectional connections (amygdala, dlPFC, PCC) and negative intrinsic connections.
  • dlPFC intrinsic self-inhibition negatively correlated with post-task positive affect, suggesting a role in emotional regulation.

Conclusions:

  • Findings enhance understanding of neural mechanisms in MUD cue reactivity and addiction.
  • Increased amygdala-cortical connectivity is linked to drug cue processing, craving, and relapse.
  • Effective connectivity analysis reveals interconnected pathways (amygdala, dlPFC, PCC) crucial for intervention strategies.