Marijuana Use Predicts Cognitive Performance on Tasks of Executive Function
| Autor: | Meredith W. Dreman, Kelly A. Sagar, Megan T. Racine, Staci A. Gruber, Mary Kathryn Dahlgren |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Marijuana Abuse Health (social science) Adolescent 030508 substance abuse Poison control Marijuana Smoking Neuropsychological Tests Toxicology Occupational safety and health 03 medical and health sciences Executive Function Young Adult 0302 clinical medicine Cognition Wisconsin Card Sorting Test Predictive Value of Tests mental disorders Injury prevention Humans Cognitive Dysfunction Effects of sleep deprivation on cognitive performance Young adult Original Research Human factors and ergonomics Psychiatry and Mental health Female 0305 other medical science Psychology Social psychology 030217 neurology & neurosurgery Psychomotor Performance Clinical psychology |
| Zdroj: | Journal of studies on alcohol and drugs. 77(2) |
| ISSN: | 1938-4114 |
| Popis: | Despite growing evidence that chronic marijuana use is associated with cognitive impairment, particularly when use is initiated at an early age, national trends demonstrate significant decreases in the perceived risk of marijuana corresponding with increased use, especially among youth. The current study assessed the impact of marijuana use on executive function and whether patterns of marijuana use, including earlier age at onset, higher frequency, and increased magnitude of use, predict impairment.Forty-four chronic, heavy marijuana smokers (37 male, 7 female) and 32 healthy, nonsmoking control participants (20 male, 12 female) recruited from the Greater Boston area completed two assessments of executive function: the Stroop Color Word Test and Wisconsin Card Sorting Test (WCST).Marijuana smokers had poorer executive function relative to control participants, a between-group difference that was primarily driven by individuals with early onset of marijuana use (before age 16; n = 21); significance remained even when controlling for frequency and magnitude of use. Further, earlier age at marijuana onset and increased marijuana use predicted poorer neurocognitive performance, and perseverative errors on the WCST significantly predicted marijuana group membership.These findings underscore the impact of early onset of marijuana use on executive function impairment independent of increased frequency and magnitude of use. In addition, poorer performance on the WCST may serve as a neuropsychological marker for heavy marijuana users. These results highlight the need for additional research to identify predictors associated with early marijuana use, as exposure to marijuana during a period of developmental vulnerability may result in negative cognitive consequences. |
| Databáze: | OpenAIRE |
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