Journal of the International Neuropsychological Society
July 1, 2021
Kelly A. Sagar, M. Dahlgren, Ashley M. Lambros et al.
Abstract Objective: Cannabis use has increased dramatically across the country; however, few studies have assessed the long-term impact of medical cannabis (MC) use on cognition. Studies examining recreational cannabis users generally report cognitive decrements, particularly in those with adolescent onset. As MC patients differ from recreational consumers in motives for use, product selection,...
Drug and Alcohol Dependence
September 1, 2018
Kelly A. Sagar, Ashley M. Lambros, Mary Kathryn Dahlgren et al.
Cannabis concentrates, including dabs, contain extremely high levels of Δ9-tetrahydrocannabinol (THC). Although these products appear to be gaining popularity among recreational cannabis consumers, little data exists regarding concentrate use in the US. We conducted a national web-based survey to examine patterns of concentrate use, specifically dabbing. 4077 respondents completed a survey...
International Review of Psychiatry
May 4, 2018
Kelly A. Sagar, Staci A Gruber
Abstract The neurobiologic effects of cannabis, commonly referred to as ‘marijuana’ (MJ), have been studied for decades. The impact of recreational MJ use on cognition and measures of brain function and structure is outlined, and variables influencing study results are discussed, including age of the consumer, patterns of MJ use, variations in MJ potency, and the presence of additional...
Frontiers in Pharmacology
January 17, 2018
Staci A Gruber, Kelly A. Sagar, M. Dahlgren et al.
The vast majority of states have enacted full or partial medical marijuana (MMJ) programs, causing the number of patients seeking certification for MMJ use to increase dramatically in recent years. Despite increased use of MMJ across the nation, no studies thus far have examined the specific impact of MMJ on cognitive function and related brain activation. In the present study, MMJ patients...
Developmental Cognitive Neuroscience
December 2015
Kelly A. Sagar, M K Dahlgren, A Gönenç et al.
Marijuana (MJ) use is on the rise, particularly among teens and emerging adults. This poses serious public health concern, given the potential deleterious effects of MJ on the developing brain. We examined 50 chronic MJ smokers divided into early onset (regular MJ use prior to age 16; n=24) and late onset (age 16 or later; n=26), and 34 healthy control participants (HCs). All completed a...