The DOI matches its Crossref record; 44 of the 44 references it cites were found in a registry or an index.
Cannabis use before age 15 and subsequent executive functioning
Open accessAbstract
Background: Many studies have suggested that adolescence is a period of particular vulnerability to neurocognitive effects associated with substance misuse. However, few large studies have measured differences in cognitive performance between chronic cannabis users who started in early adolescence (before age 15) with those who started later. Aims: To examine the executive functioning of individuals who started chronic cannabis use before age 15 compared with those who started chronic cannabis use after 15 and controls. Method: We evaluated the performance of 104 chronic cannabis users (49 early-onset users and 55 late-onset users) and 44 controls who undertook neuropsychological tasks, with a focus on executive functioning. Comparisons involving neuropsychological measures were performed using generalised linear model analysis of variance (ANOVA). Results: The early-onset group showed significantly poorer performance compared with the controls and the late-onset group on tasks assessing sustained attention, impulse control and executive functioning. Conclusions: Early-onset chronic cannabis users exhibited poorer cognitive performance than controls and late-onset users in executive functioning. Chronic cannabis use, when started before age 15, may have more deleterious effects on neurocognitive functioning.
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A compendium of neuropsychological tests: administration, norms, and commentary
(1991) · Choice Reviews Online · doi:10.5860/choice.29-2400 · Cited by 6,120
Dynamic mapping of human cortical development during childhood through early adulthood
Gogtay, N., Giedd, J. N., Lusk, L., Hayashi, K. M., Greenstein, D., Vaituzis, A. C., Nugent, T. F., Herman, D. H., Clasen, L. S., Toga, A. W., et al. (2004) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0402680101 · Cited by 5,604
Brain development during childhood and adolescence: a longitudinal MRI study
Giedd, J. N., Blumenthal, J., Jeffries, N. O., Castellanos, F. X., Liu, H., Zijdenbos, A., Paus, T., Evans, A. C., & Rapoport, J. L. (1999) · Nature Neuroscience · doi:10.1038/13158 · Cited by 5,552
A Compendium of Neuropsychological Tests: Administration, Norms, and Commentary
Levin, H. S. (1993) · Archives of Neurology · doi:10.1001/archneur.1993.00540050007005 · Cited by 4,766
The FAB: A frontal assessment battery at bedside
Dubois, B., Slachevsky, A., Litvan, I., & Pillon, B. (2000) · Neurology · doi:10.1212/wnl.55.11.1621 · Cited by 3,913
Wisconsin Card Sorting Test Manual – Revised and Expanded
Heaton, R. K., Chelune, C., Talley, J., Kay, G., & Curtiss, G. (1981) · Medical Entomology and Zoology · Cited by 2,974
Robins, L. N. (1988) · Archives of General Psychiatry · doi:10.1001/archpsyc.1988.01800360017003 · Cited by 2,909
A Compendium of Neuropsychological Tests: Administration, Norms, and Commentary
Selnes, O. A. (1991) · Neurology · doi:10.1212/wnl.41.11.1856-a · Cited by 2,252
Strauss, E., & Spreen, O. (2009) · Cited by 1,440
Degenhardt, L., Chiu, W.-T., Sampson, N., Kessler, R. C., Anthony, J. C., Angermeyer, M., Bruffaerts, R., de Girolamo, G., Gureje, O., Huang, Y., et al. (2008) · PLoS Medicine · doi:10.1371/journal.pmed.0050141 · Cited by 796
Cited by
Persistent cannabis users show neuropsychological decline from childhood to midlife
Meier, M. H., Caspi, A., Ambler, A., Harrington, H., Houts, R., Keefe, R. S. E., McDonald, K., Ward, A., Poulton, R., & Moffitt, T. E. (2012) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1206820109 · Cited by 1,523
Effects of Cannabis Use on Human Behavior, Including Cognition, Motivation, and Psychosis: A Review
Volkow, N. D., Swanson, J. M., Evins, A. E., DeLisi, L. E., Meier, M. H., Gonzalez, R., Bloomfield, M. A. P., Curran, H. V., & Baler, R. (2016) · JAMA Psychiatry · doi:10.1001/jamapsychiatry.2015.3278 · Cited by 867
Acute and Chronic Effects of Cannabinoids on Human Cognition—A Systematic Review
Broyd, S. J., van Hell, H. H., Beale, C., Yücel, M., & Solowij, N. (2016) · Biological Psychiatry · doi:10.1016/j.biopsych.2015.12.002 · Cited by 674
Cannabis and adolescent brain development.
Lubman, D. I., Cheetham, A., & Yücel, M. (2015) · Pharmacology & Therapeutics · doi:10.1016/j.pharmthera.2014.11.009 · Cited by 360
Schizophrenia: a tale of two critical periods for prefrontal cortical development
Selemon, L. D., & Zecevic, N. (2015) · Translational Psychiatry · doi:10.1038/tp.2015.115 · Cited by 336
Metadata
- Authors
- Fontes, M. A., Bolla, K. I., Cunha, P. J., Almeida, P. P., Jungerman, F., Laranjeira, R. R., Bressan, R. A., & Lacerda, A. L. T.
- Venue
- British Journal of Psychiatry
- Publisher
- Royal College of Psychiatrists
- Published
- 2011-06
- Volume
- 198
- Issue
- 6
- Pages
- 442-447
- ISSN
- 0007-1250 (ISSN-L)
- 1472-1465
- OpenAlex
- W2129308807
- Cited by
- 300
- References
- 44
- FWCI
- 11.68
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Fontes, M. A., Bolla, K. I., Cunha, P. J., Almeida, P. P., Jungerman, F., Laranjeira, R. R., Bressan, R. A., & Lacerda, A. L. T. (2011). Cannabis use before age 15 and subsequent executive functioning. British Journal of Psychiatry. https://doi.org/10.1192/bjp.bp.110.077479
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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