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Related Experiment Video

Updated: Jan 22, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
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Striatal functional connectivity in chronic ketamine users: a pilot study.

Chia-Chun Hung1,2, Sheng Zhang3, Chun-Ming Chen4

  • 1Bali Psychiatric Center, Ministry of Health and Welfare, Taoyuan, Taiwan.

The American Journal of Drug and Alcohol Abuse
|July 3, 2019
PubMed
Summary
This summary is machine-generated.

Chronic ketamine misuse alters brain connectivity in the striatum, impacting impulse control. Putamen connectivity with the orbitofrontal cortex may link impulsivity to ketamine use duration.

Keywords:
KetamineSUDfMRIimpulsivityinsulasex differencestriatum

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Area of Science:

  • Neuroscience
  • Neuroimaging
  • Addiction Research

Background:

  • The striatum is crucial for motivated behavior and impulse control.
  • Dysfunctional striatal activation and connectivity are linked to impulse control issues in addiction.

Purpose of the Study:

  • To investigate alterations in resting-state functional connectivity (rsFC) of the striatum due to chronic ketamine misuse.
  • To explore the relationship between striatal connectivity, impulsivity, and duration of ketamine use.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to assess rsFC in 36 ketamine users and 20 healthy controls.
  • Voxel-wise connectivities of the caudate, pallidum, putamen, and ventral striatum were examined.
  • The Barratt Impulsiveness Scale (BIS-11) assessed impulsivity; duration of ketamine use was also recorded.

Main Results:

  • Ketamine users exhibited increased connectivity between the caudate and dorsal anterior cingulate cortex, and between the pallidum and cerebellum.
  • In ketamine users, putamen connectivity with the left orbitofrontal cortex (OFC) correlated with both BIS-11 scores and duration of use.
  • Mediation analyses indicated that connectivity strength mediated the link between impulsivity and ketamine use duration.

Conclusions:

  • Chronic ketamine misuse is associated with altered striatal connectivity.
  • Putamen-OFC connectivity may play a role in the relationship between impulsivity and the duration of ketamine use.
  • These findings suggest potential neural markers for ketamine misuse, warranting further investigation in larger cohorts.