Repeated ecstasy (MDMA) use is reported to impair cognition and cause increased feelings of depression and anxiety. Yet, many relevant studies have failed to control for use of drugs other than MDMA, especially marijuana (THC). To address these confounding effects we compared behavioural performance of 11 MDMA/THC users, 15 THC users and 15 non-drug users matched for age and intellect. We...
Back to table of contents Previous article Next article Clinical & Research NewsFull AccessMarijuana-Induced Psychosis May Foretell Future EpisodesJoan Arehart-TreichelJoan Arehart-TreichelSearch for more papers by this authorPublished Online:3 Feb 2006https://doi.org/10.1176/pn.41.3.0023Reports from various researchers have suggested that marijuana-induced psychosis is generally short-lived...
Although little evidence supports cannabis-induced amotivational syndrome, sources continue to assert that the drug saps motivation 1, which may guide current prohibitions. Few studies report low motivation in chronic users; another reveals that they have higher subjective wellbeing. To assess differences in motivation and subjective wellbeing, we used a large sample (N = 487) and strict...
The aim of the study is to assess if cognitive impairments in abstinent users of methylenedioxymethamphetamine (MDMA) are due to repeated use of MDMA or concurrent drugs of abuse and how these impairments interfere with key activities of daily life such as automobile driving. Simulated driving performance and attention of 12 users of MDMA and marijuana [tetrahydrocannabinol (THC)] (MDMA/THC),...
Immer mehr junge Menschen konsumieren Cannabis in manchmal hohen Dosierungen, wenn ihr Gehirn noch nicht voll entwickelt ist und besonders empfindlich auf äußere Einflüsse reagiert. Cannabis kann psychotische Zustände auslösen und verstärken, bereits an Schizophrenie Erkrankte exazerbieren bei Cannabiskonsum häufiger akut. Ersterkrankte Schizophrene mit vorherigem regelmäßigen Cannabiskonsum...
The genital-shrinking syndrome is a transient state of acute anxiety characterized by the triad of a deep-seated fear of penile shrinkage, its disappearance into the abdomen, and apprehension regarding inevitable impotence or even death. It is also known by the Malayo-Indonesian term 'koro'. In the West, koro syndrome has been reported only in relation with various somatic, psychiatric and...
Psychopathology2006E.J. Barkus, J. Stirling, R.S. Hopkins et al.
Objective: Recent studies have suggested that cannabis use is a risk factor for developing schizophrenia. We tested the hypothesis that cannabis use increases the likelihood of psychosis-like experiences in non-clinical participants who scored highly on a measure of schizotypy. Method: The psychological effects of cannabis were assessed in 137 healthy individuals (76% female, mean age 22 years)...
Cannabis use often induces subjective distortions of perception. However, little work has been done examining the electroencephalographic (EEG) correlates of early sensory processing in cannabis users. The present study therefore examined visual function in cannabis users as assessed via the steady state visual evoked potential. (SSVEP). SSVEPs were examined in current cannabis users (n = 17;...
Alterations of long-term synaptic plasticity have been proposed to participate in the development of addiction. To preserve synaptic functions, homeostatic processes must be engaged after exposure to abused drugs. At the mouse cortico-accumbens synapses, a single in vivo injection of Delta9-tetrahydrocannabinol (THC) suppresses endocannabinoid-mediated long-term depression. Using biochemical...