Neuropsychological deficits in adolescent methamphetamine abusers

Area of Science:

• Neuroscience
• Psychiatry
• Developmental Psychology

Background:

• Methamphetamine (METH) abuse is linked to neurotoxicity and cognitive deficits in adults.
• The impact of METH on adolescent neurocognition remains largely unexamined.

Purpose of the Study:

• To investigate the neurocognitive effects of METH use in adolescents.
• To assess specific cognitive domains affected by METH in this age group.

Main Methods:

• Neuropsychological testing of 54 adolescent METH users and 74 controls (ages 12-23).
• Evaluated domains included psychomotor speed, executive function, fine-motor speed, memory, attention, and working memory.

Main Results:

• METH users exhibited slower performance on the Stroop Interference task and poorer scores on the WAIS/WISC Matrices task.
• Adolescent METH users were significantly impaired on the Grooved Pegboard task for both dominant and non-dominant hands.
• Longer abstinence correlated with better performance on the Peg Board and Digit Span tasks.

Conclusions:

• Methamphetamine use is associated with significant impairments in executive functions among adolescent users.
• Findings highlight the detrimental effects of METH on adolescent brain development and cognitive abilities.