Neuropsychological deficits in adolescent methamphetamine abusers.

Psychopharmacology
George KingLinda Chang

Abstract

Methamphetamine (METH) is a widely abused psychostimulant that is associated with neurotoxicity and neurocognitive impairments in adults. However, the effects of METH use on neurocognitive performance of adolescents are unclear. Fifty-four adolescent METH users and 74 age-matched comparison subjects (ages 12 to 23 years) were evaluated with a battery of neuropsychological tests. The cognitive domains evaluated include psychomotor (Symbol Digit, Trail Making), executive function (Stroop Interference task, Wisconsin Card Sort task), fine-motor speed (Grooved Pegboard), memory (Digit span and Auditory Verbal Learning Task), as well as attention and working memory (California Computerized Assessment package). METH users were slower on the Stroop Interference task than the comparison subjects (F(1,114) = 4.33, p = 0.03). METH subjects also performed worse than controls on the Wechsler Adult Intelligence Scale III/Wechsler Intelligence Scale for Children IV (WAIS/WISC) Matrices task (F(1,114) = 4.37, p = 0.04) and performed significantly worse on the Peg Board task than the comparison subjects for both the dominant (F(1,114) = 7.56, p = 0.01) and non-dominant (F(1,114) = 6.75, p = 0.01). Lastly, length of abstinence was associated wi...Continue Reading

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