Substance Abuse and Rehabilitation
2013
Tabea Schoeler, Sagnik Bhattacharyya
Investigating the effects of cannabis use on memory function appears challenging. While early observational investigations aimed to elucidate the longer-term effects of cannabis use on memory function in humans, findings remained equivocal and pointed to a pattern of interacting factors impacting on the relationship between cannabis use and memory function, rather than a simple direct effect of...
eScholarship@McGill
2013
Clifford M. Cassidy
Introduction. La comorbidité entre les troubles psychotiques et l'abus de substances est associée à une évolution négative. Pour mieux traiter l'abus de substance dans la psychose, il est nécessaire d'identifier les facteurs spécifiques qui augmentent la prévalence de consommation de substances dans cette population, particulièrement les aspects du trouble psychotique qui pourraient exacerber...
Frontiers in Psychiatry
2013
Benjamin J. Chadwick, M. L. Miller, Yasmin L. Hurd
216 citations
Cannabis use is increasingly pervasive among adolescents today, even more common than cigarette smoking. The evolving policy surrounding the legalization of cannabis reaffirms the need to understand the relationship between cannabis exposure early in life and psychiatric illnesses. cannabis contains psychoactive components, notably Δ(9)-tetrahydrocannabinol (THC), that interfere with the...
Frontiers in Psychiatry
2013
Jonathan Kenneth Burns
63 citations
The nature of the relationship between cannabis use (CU) and psychosis is complex and remains unclear. Researchers and clinicians remain divided regarding key issues such as whether or not cannabis is an independent cause of psychosis and schizophrenia. This paper reviews the field in detail, examining questions of causality, the neurobiological basis for such causality and for differential...
Pain
2013
Michael Lee, M. Ploner, K. Wiech et al.
Summary fMRI evidence suggests that delta‐9‐tetrahydrocannabinol, the psychoactive component of cannabis, targets the affective aspects of pain in humans by altering the activity and functional connections of the amygdala. Abstract Cannabis is reported to be remarkably effective for the relief of otherwise intractable pain. However, the bases for pain relief afforded by this psychotropic agent...
Addiction
December 10, 2012
Merel F. H. Griffith‐Lendering, Johanna T. W. Wigman, Andrea Prince van Leeuwen et al.
67 citations
AIMS: To examine the direction of the longitudinal association between vulnerability for psychosis and cannabis use throughout adolescence. DESIGN: Cross-lagged path analysis was used to identify the temporal order of vulnerability for psychosis and cannabis use, while controlling for gender, family psychopathology, alcohol use and tobacco use. SETTING: A large prospective population study of...
Psychological Medicine
December 1, 2012
Andrea M. Auther, Danielle McLaughlin, Ricardo E Carrión et al.
Background: Clinical and epidemiological studies suggest an association between cannabis use and psychosis but this relationship remains controversial. Method: Clinical high-risk (CHR) subjects (age 12–22 years) with attenuated positive symptoms of psychosis (CHR+,n=101) were compared to healthy controls (HC,n=59) on rates of substance use, including cannabis. CHR+ subjects with and without...
Drug and Alcohol Dependence
December 1, 2012
Jason M Wiebelhaus, Justin L. Poklis, Alphonse Poklis et al.
Use of synthetic "marijuana" has increased in recent years, produced adverse effects and prompted the temporary DEA ban of five specific cannabinoid analogs, including JWH-018. The objectives of the current study include determining the chemical content of the herbal product, Buzz, assessing its behavioral effects upon inhalation exposure to mice, determining whether CB(1) receptors mediate its...
Psychopharmacology
November 24, 2012
Richard A Sewell, Ashley Schnakenberg, Jacqueline Elander et al.
Cannabinoids have been shown to alter time perception, but existing literature has several limitations. Few studies have included both time estimation and production tasks, few control for subvocal counting, most had small sample sizes, some did not record subjects’ cannabis use, many tested only one dose, and used either oral or inhaled administration of Δ9-tetrahydrocannabinol (THC), leading...
Neuroimage
November 15, 2012
Linda E. Klumpers, David M. Cole, Najmeh Khalili-Mahani et al.
Resting state-functional magnetic resonance imaging (RS-FMRI) is a neuroimaging technique that allows repeated assessments of functional connectivity in resting state. While task-related FMRI is limited to indirectly measured drug effects in areas affected by the task, resting state can show direct CNS effects across all brain networks. Hence, RS-FMRI could be an objective measure for compounds...