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Do individuals with former amphetamine dependence have cognitive deficits?
Pekka Rapeli1, Reetta Kivisaari, Seppo Kähkönen
1Psychiatric Unit for Drug Dependence, Helsinki University Central Hospital, HUS, Finland. pekka.rapeli@hus.fi
Nordic Journal of Psychiatry
|October 1, 2005
Summary
Former amphetamine dependence is linked to deficits in verbal memory, but overall cognitive function remains normal after at least one year of abstinence. Further investigation is needed for other potential causes of cognitive impairment.
Area of Science:
- Neuroscience
- Psychology
- Addiction Medicine
Background:
- Amphetamine dependence can have lasting effects on brain function.
- Understanding long-term cognitive outcomes is crucial for treatment and recovery.
Purpose of the Study:
- To investigate the association between former amphetamine dependence and cognitive performance.
- To identify specific cognitive domains affected by past amphetamine abuse.
Main Methods:
- Compared 12 abstinent individuals (≥1 year) with former amphetamine dependence to 12 matched controls.
- Administered cognitive tests assessing attention, memory, executive function, and fluid intelligence.
Main Results:
- Former amphetamine users showed significantly poorer performance in the memory domain compared to controls.
- Specific deficits were noted in delayed verbal memory tests.
- Results were consistent even after excluding participants with current psychiatric diagnoses.
Conclusions:
- Individuals with former amphetamine dependence exhibit largely normal cognitive function.
- A potential exception is verbal memory, which may be impaired.
- Widespread cognitive deficits warrant investigation into causes beyond amphetamine abuse itself.
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