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Adolescent substance abuse: the effects of alcohol and marijuana on neuropsychological performance.
Thoma, Robert J; Monnig, Mollie A; Lysne, Per A; Ruhl, David A; Pommy, Jessica A; Bogenschutz, Michael; Tonigan, J Scott; Yeo, Ronald A.
  • Thoma RJ; Department of Psychiatry, University of New Mexico, Albuquerque, 87131, USA. rjthoma@salud.unm.edu
Alcohol Clin Exp Res ; 35(1): 39-46, 2011 Jan.
Article en En | MEDLINE | ID: mdl-20958330
ABSTRACT

BACKGROUND:

Adolescence is a period in which cognition and brain undergo dramatic parallel development. Whereas chronic use of alcohol and marijuana is known to cause cognitive impairments in adults, far less is known about the effect of these substances of abuse on adolescent cognition, including possible interactions with developmental processes.

METHODS:

Neuropsychological performance, alcohol use, and marijuana use were assessed in 48 adolescents (ages 12 to 18), recruited in 3 groups a healthy control group (HC, n = 15), a group diagnosed with substance abuse or dependence (SUD, n = 19), and a group with a family history positive for alcohol use disorder (AUD) but no personal substance use disorder (FHP, n = 14). Age, drinks per drinking day (DPDD), percentage days drinking, and percentage days using marijuana were considered as covariates in a MANCOVA in which 6 neuropsychological composites (Verbal Reasoning, Visuospatial Ability, Executive Function, Memory, Attention, and Processing Speed) served as dependent variables.

RESULTS:

More DPDD predicted poorer performance on Attention and Executive Function composites, and more frequent use of marijuana was associated with poorer Memory performance. In separate analyses, adolescents in the SUD group had lower scores on Attention, Memory, and Processing Speed composites, and FHP adolescents had poorer Visuospatial Ability.

CONCLUSIONS:

In combination, these analyses suggest that heavy alcohol use in adolescence leads to reduction in attention and executive functioning and that marijuana use exerts an independent deleterious effect on memory. At the same time, premorbid deficits associated with family history of AUD appeared to be specific to visuospatial ability.
Asunto(s)

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Abuso de Marihuana / Cognición / Trastornos Relacionados con Alcohol / Alcoholismo / Procesos Mentales Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Adolescent / Child / Female / Humans / Male Idioma: En Año: 2011 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Abuso de Marihuana / Cognición / Trastornos Relacionados con Alcohol / Alcoholismo / Procesos Mentales Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Adolescent / Child / Female / Humans / Male Idioma: En Año: 2011 Tipo del documento: Article