Adolescent‐onset heavy cannabis use associated with significantly reduced glial but not neuronal markers and glutamate levels in the hippocampus Grace Blest‐Hopley | Aisling O'Neill | Robin Wilson | Vincent Giampietro | David Lythgoe | Alice Egerton | Sagnik Bhattacharyya Addiction Biology, 2019, e12827, 1-11. DOI: 10.1111/adb.12827 Abstract Cannabis use has been associated with adverse mental health outcomes, the neurochemical underpinnings of which are poorly understood. Although preclinical evidence suggests glutamatergic dysfunction following cannabis exposure in several brain regions including the hippocampus, evidence from human studies have been inconsistent. We investigated the effect of persistent cannabis use on the brain levels of N‐acetyl aspartate (NAA) and myo-inositol, [...]
Lire la suiteLong-term Heavy Cannabis Use : implications for health education Niall COGGANS, Phil DALGARNO, Lindsay JOHNSON & David SHEWAN Drugs : education, prevention and policy, 2004, Vol. 11, No. 4, 299–313 ABSTRACT There is growing evidence that cannabis can have negative effects on health. While the ongoing debate about the nature and duration of these effects recognizes mild cognitive impairment, the evidence for irreversibility of cognitive impairment and causal links with psychiatric illness is not conclusive. There is undoubtedly potential for impairment of respiratory functioning, but that will depend on lifetime load and in most cases is confounded with tobacco smoking. There is a [...]
Lire la suiteEpidemiology of adolescent Salvia divinorum use in Canada Cheryl L. Currie Drug and Alcohol Dependence, 2012, 128, (1-2) DOI: 10.1016/j.drugalcdep.2012.08.008 a b s t r a c t Background : Salvia divinorum is a potent, naturally occurring hallucinogen gaining popularity as a recreational drug in North America. To date, detailed epidemiologic information about the use of this substance among adolescents living outside the United States has been limited. This study provides information on the prevalence and correlates of Salvia divinorum use among adolesecents in Canada using a nationally representative sample. Methods : Data were obtained from a representative sample of 42,179 Canadian adolescents aged 12–17 years living [...]
Lire la suiteAssociations between Adolescent Cannabis Use and Neuropsychological Decline : A Longitudinal Co-Twin Control Study Madeline H. Meier, Avshalom Caspi, Andrea Danese, Helen L. Fisher, Renate Houts, Louise Arseneault, & Terrie E. Moffitt Addiction. 2018, 113, (2), 257-265. doi: 10.1111/add.13946. Abstract Aims : This study tested whether adolescents who used cannabis or met criteria for cannabis dependence showed neuropsychological impairment prior to cannabis initiation and neuropsychological decline from before to after cannabis initiation. Design : A longitudinal co-twin control study. Setting and Participants : Participants were 1,989 twins from the Environmental Risk (E-Risk) Longitudinal Twin Study, a nationally representative birth cohort of twins born in England and Wales [...]
Lire la suiteAssociations between adolescent cannabis use frequency and adult brain structure : A prospective study of boys followed to adulthood. Madeline H. Meier, Roberta A. Schriber, Jordan Beardslee, Jamie Hanson, Dustin Pardini Drug and Alcohol Dependence, 2019, 202, 191-199 Copyright © 2019. Published by Elsevier B.V. PMID : 31357120 DOI : 10.1016/j.drugalcdep.2019.05.012 Abstract BACKGROUND : Few studies have tested the hypothesis that adolescent cannabis users show structural brain alterations in adulthood. The present study tested associations between prospectively-assessed trajectories of adolescent cannabis use and adult brain structure in a sample of boys followed to adulthood. METHODS : Data came from the Pittsburgh Youth Study - a longitudinal [...]
Lire la suiteConsommer du cannabis à l’adolescence n’aurait pas d’impact sur la structure du cerveau à l’âge adulte 31 juillet 2019 Floriane Ramfos © DR La dangerosité du cannabis pour le développement neuronal des adolescents est un argument courant chez les partisans de la prohibition. Pourtant, selon une étude du Drug and Alcohol Dependence, la consommation de cannabis pendant l’adolescence n’est pas associée à des différences structurelles dans le cerveau à l’âge adulte. Méthodologie et résultats L’étude a été réalisée auprès de 1000 hommes, auxquels les chercheurs ont demandé de déclarer leur consommation de cannabis lorsqu’ils avaient entre 13 à 19 ans. Cela a permis aux scientifiques d’identifier différentes [...]
Lire la suiteUsages d’alcool, de tabac et de cannabis chez les adolescents du secondaire en 2018 Stanislas Spilka, Emmanuelle Godeau (EHESP), Olivier Le Nézet, Virginie Ehlinger (Inserm UMR 1027), Eric Janssen, Alex Brissot, Antoine Philippon, Sandra Chyderiotis Tendances, juin 2018 Observatoire français des drogues et des toxicomanies Observer les premiers usages de substances psychoactives chez les adolescents selon le niveau scolaire [1, 2] permet d’analyser le calendrier de diffusion des consommations pour la mise en oeuvre d’actions de prévention et de politiques de santé publique : quand et où intervenir auprès des élèves, quelles sont les classes « pivots » au cours desquelles les expérimentations s’amorcent ou [...]
Lire la suiteBibliographie : Cannabinoïdes et TSA/TED/psychoses infantiles. Dr Christian Sueur, GRECC, mars 2019. (2e version) ARAN A., CASSUTO H., LUBOTZKY : Cannabidiol Based Medical Cannabis in Children with Autism- a Retrospective Feasability Study (P3.318), Neurology Genetics, 2018, 90 (15). http://n.neurology.org/content/90/15_Supplement/P3.318 ARAN A., CASSUTO H., LUBOTZKY A., WATTAD N., HAZAN E. : Brief Report : Cannabidiol-Rich Cannabis in Children with Autism Spectrum Disorder and Severe Behavioral Problems-A Retrospective Feasability Study, Journal of Autism and Developmental Disorders, 2018 Oct 31. Doi : 10.1007/s10803-018-3808-2 BARCHEL D., STOLAR O., De-HAAN T., ZIV-BARAN T., SABAN N., FUCHS D.O., KOREN G., BERKOVITCH M. : Oral Cannabidiol Use in Children With Auttism Spectrum Disorder to Treat Related Symptoms [...]
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