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Methadone maintenance treatment and impulsivity: premature responding
Kathrin Weidacker1,2, Yijie Zhao3,4, Yingying Zhang3
1School of Psychology, Swansea University, Wales, UK.
Journal of Clinical and Experimental Neuropsychology
|November 2, 2023
Summary
Methadone maintenance treatment (MMT) patients show increased premature responding, a key impulsivity measure, correlating with higher methadone doses. This suggests a motor inhibition deficit that could inform tailored addiction treatments.
Area of Science:
- Neuroscience
- Clinical Psychology
- Addiction Research
Background:
- Methadone maintenance treatment (MMT) is associated with impulsivity, which can predict addiction-like behaviors.
- Premature responding, a measure of impulsivity, is well-studied in rodents and has translational significance.
Purpose of the Study:
- To assess premature responding and motor inhibition in MMT patients compared to healthy volunteers.
- To investigate the relationship between premature responding and methadone dosage.
Main Methods:
- Utilized the Intentional Hand Task (IHT) to assess premature responding, action, and inhibition.
- Compared 45 MMT patients with 46 demographically matched healthy volunteers (HVs).
Main Results:
- MMT patients exhibited significantly higher premature responses than HVs.
- Premature responses positively correlated with methadone dosage in MMT patients.
- MMT patients were faster and less accurate on instructed trials.
Conclusions:
- Increased premature motor reactions may indicate a specific motor inhibition deficit in MMT patients.
- Assessing premature responding could lead to more personalized MMT interventions.
- This impulsivity measure could help address dysfunctional behaviors associated with MMT.
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