Share This Author
Acute Effects of Ketamine on Memory Systems and Psychotic Symptoms in Healthy Volunteers
- C. Morgan, Ali Mofeez, B. Brandner, L. Bromley, H. Curran
- Psychology, BiologyNeuropsychopharmacology
The data suggest that, in humans, ketamine produces a selective pattern of impairments to working, episodic, and procedural memory but not to perceptual priming, attention or aspects of executive functioning.
Keep off the grass? Cannabis, cognition and addiction
- H. Curran, T. Freeman, C. Mokrysz, David A. Lewis, C. Morgan, L. Parsons
- MedicineNature Reviews Neuroscience
- 1 May 2016
The current state of knowledge about vulnerability factors, the variations in types of cannabis, and the relationship between these and cognition and addiction are reviewed.
Impact of cannabidiol on the acute memory and psychotomimetic effects of smoked cannabis: naturalistic study
- C. Morgan, G. Schafer, T. Freeman, H. Curran
- Medicine, PsychologyBritish Journal of Psychiatry
- 1 October 2010
The antagonistic effects of cannabidiol at the CB1 receptor are probably responsible for its profile in smoked cannabis, attenuating the memory-impairing effects of THC.
Consequences of chronic ketamine self-administration upon neurocognitive function and psychological wellbeing: a 1-year longitudinal study.
Findings imply that heavy use of ketamine is harmful to aspects of both cognitive function and psychological wellbeing.
Acute and chronic effects of ketamine upon human memory: a review
This article reviews the existing literature on the effects of acute ketamine on the memory of healthy volunteers and of repeated doses of ketamine in recreational users and suggests that ketamine may differ from other classic amnestic drugs in impairing aspects of semantic memory.
Cognitive and subjective effects of mephedrone and factors influencing use of a 'new legal high'.
- T. Freeman, C. Morgan, James Vaughn-Jones, Nahida Hussain, K. Karimi, H. Curran
- Psychology, MedicineAddiction
- 1 April 2012
Mephedrone impairs working memory acutely, induces stimulant-like effects in users and is associated with binge use, which might help to predict future trends in use of the many new psychoactive substances emerging on the internet.
The Psychotomimetic States Inventory (PSI): Measuring psychotic-type experiences from ketamine and cannabis
Effects of cannabidiol on schizophrenia-like symptoms in people who use cannabis
Hair samples were analysed to examine levels of Δ9-THC and CBD in 140 individuals and three clear groups emerged: ’THC only’, ‘THC+CBD’ and those with no cannabinoid in hair, which provides evidence of the divergent properties of cannabinoids.
Ketamine use: a review.
The implications of these findings are drawn out for treatment of ketamine-induced ulcerative cystitis in which interventions from urologists and from addiction specialists should be coordinated.
Cognitive, dissociative and psychotogenic effects of ketamine in recreational users on the night of drug use and 3 days later.
Ketamine appears to induce acute and severe impairments of working, episodic and semantic memory as well as psychotogenic and dissociative effects and schizotypal symptomatology.