Celia Ja Morgan

Summary

Affiliation: University College London
Country: UK

Publications

  1. doi request reprint Hyper-priming in cannabis users: a naturalistic study of the effects of cannabis on semantic memory function
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, Gower St, London, WC1E 6BT, United Kingdom
    Psychiatry Res 176:213-8. 2010
  2. doi request reprint Cannabidiol reduces cigarette consumption in tobacco smokers: preliminary findings
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Addict Behav 38:2433-6. 2013
  3. doi request reprint Cerebrospinal fluid anandamide levels, cannabis use and psychotic-like symptoms
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, Gower St, London WC1E 6BT, UK
    Br J Psychiatry 202:381-2. 2013
  4. doi request reprint Effects of cannabidiol on schizophrenia-like symptoms in people who use cannabis
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, London, UK
    Br J Psychiatry 192:306-7. 2008
  5. pmc Is persistent ketamine use a valid model of the cognitive and oculomotor deficits in schizophrenia?
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, United Kingdom
    Biol Psychiatry 65:1099-102. 2009
  6. doi request reprint Ketamine use, cognition and psychological wellbeing: a comparison of frequent, infrequent and ex-users with polydrug and non-using controls
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Addiction 104:77-87. 2009
  7. doi request reprint Consequences of chronic ketamine self-administration upon neurocognitive function and psychological wellbeing: a 1-year longitudinal study
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Clinical Health Psychology, University College London, London, UK
    Addiction 105:121-33. 2010
  8. doi request reprint Harms associated with psychoactive substances: findings of the UK National Drug Survey
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    J Psychopharmacol 24:147-53. 2010
  9. pmc Cannabidiol attenuates the appetitive effects of Delta 9-tetrahydrocannabinol in humans smoking their chosen cannabis
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Research Department of Clinical, Health and Educational Psychology, University College London, London, UK
    Neuropsychopharmacology 35:1879-85. 2010
  10. doi request reprint Attentional bias to incentive stimuli in frequent ketamine users
    C J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Psychol Med 38:1331-40. 2008

Detail Information

Publications22

  1. doi request reprint Hyper-priming in cannabis users: a naturalistic study of the effects of cannabis on semantic memory function
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, Gower St, London, WC1E 6BT, United Kingdom
    Psychiatry Res 176:213-8. 2010
    ..The acute increase in automatic semantic priming may be one factor contributing to the psychotomimetic effects of cannabis...
  2. doi request reprint Cannabidiol reduces cigarette consumption in tobacco smokers: preliminary findings
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Addict Behav 38:2433-6. 2013
    ..These preliminary data, combined with the strong preclinical rationale for use of this compound, suggest CBD to be a potential treatment for nicotine addiction that warrants further exploration...
  3. doi request reprint Cerebrospinal fluid anandamide levels, cannabis use and psychotic-like symptoms
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, Gower St, London WC1E 6BT, UK
    Br J Psychiatry 202:381-2. 2013
    ..Levels of CSF anandamide were negatively correlated with persisting psychotic symptoms when drug-free. Higher levels of anandamide are associated with a lower risk of psychotic symptoms following cannabis use...
  4. doi request reprint Effects of cannabidiol on schizophrenia-like symptoms in people who use cannabis
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, London, UK
    Br J Psychiatry 192:306-7. 2008
    ..This provides evidence of the divergent properties of cannabinoids and has important implications for research into the link between cannabis use and psychosis...
  5. pmc Is persistent ketamine use a valid model of the cognitive and oculomotor deficits in schizophrenia?
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, United Kingdom
    Biol Psychiatry 65:1099-102. 2009
    ..In this study, we investigated the effect of persistent recreational ketamine use on tests of episodic and working memory and on oculomotor tasks of smooth pursuit and pro- and antisaccades...
  6. doi request reprint Ketamine use, cognition and psychological wellbeing: a comparison of frequent, infrequent and ex-users with polydrug and non-using controls
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Addiction 104:77-87. 2009
    ..In this study we aimed to determine how variations in ketamine use and abstention from prior use affect neurocognitive function and psychological wellbeing...
  7. doi request reprint Consequences of chronic ketamine self-administration upon neurocognitive function and psychological wellbeing: a 1-year longitudinal study
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Clinical Health Psychology, University College London, London, UK
    Addiction 105:121-33. 2010
    ..In healthy individuals an acute dose of the N-methyl D-aspartate (NMDA) receptor antagonist ketamine induces marked psychosis-like effects and cognitive impairments, but little is known about the long-term effects of the drug...
  8. doi request reprint Harms associated with psychoactive substances: findings of the UK National Drug Survey
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    J Psychopharmacol 24:147-53. 2010
    ..They also suggest that the current UK legal classification system is not acting to inform users of the harms of psychoactive substances...
  9. pmc Cannabidiol attenuates the appetitive effects of Delta 9-tetrahydrocannabinol in humans smoking their chosen cannabis
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Research Department of Clinical, Health and Educational Psychology, University College London, London, UK
    Neuropsychopharmacology 35:1879-85. 2010
    ..Our findings suggest that CBD has potential as a treatment for cannabis dependence. The acute modulation of the incentive salience of drug cues by CBD may possibly generalize to a treatment for other addictive disorders...
  10. doi request reprint Attentional bias to incentive stimuli in frequent ketamine users
    C J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Psychol Med 38:1331-40. 2008
    ..Dependence on ketamine has been reported anecdotally but no systematic study has investigated this phenomenon. We aimed to explore attentional biases to incentive stimuli in different populations of ketamine users...
  11. ncbi request reprint Beyond the K-hole: a 3-year longitudinal investigation of the cognitive and subjective effects of ketamine in recreational users who have substantially reduced their use of the drug
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London, UK
    Addiction 99:1450-61. 2004
    ..However, the degree to which these deficits might be reversible upon reduction or cessation of ketamine use was not known...
  12. ncbi request reprint Acute and chronic effects of ketamine upon human memory: a review
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, Gower Street, London, WC1E 6BT, UK
    Psychopharmacology (Berl) 188:408-24. 2006
    ..Ketamine is attracting increasing research interest not only because of its powerful amnestic effects but also as a putative model of schizophrenia and as a substance with an expanding following of recreational users...
  13. ncbi request reprint Acute effects of ketamine on memory systems and psychotic symptoms in healthy volunteers
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, London, England
    Neuropsychopharmacology 29:208-18. 2004
    ..These 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...
  14. ncbi request reprint Ketamine impairs response inhibition and is positively reinforcing in healthy volunteers: a dose-response study
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Sub Department of Clinical Health Psychology, University College London, Gower St, London, WC1E 6BT, UK
    Psychopharmacology (Berl) 172:298-308. 2004
    ..Previous research has found persisting cognitive and psychotogenic effects of ketamine in chronic abusers of this drug 3 days after an acute dose...
  15. ncbi request reprint Evidence of semantic disorganisation using semantic priming in individuals with high schizotypy
    C Morgan
    Section of Cognitive Neuropsychiatry, Psychological Medicine, Institute of Psychiatry, De Crespigny Park, London, UK
    Schizophr Res 84:272-80. 2006
    ..The current study suggests that, when confounds are controlled for, schizophrenia-like symptoms are not related to an increase in automatic spreading of activation...
  16. ncbi request reprint Semantic priming after ketamine acutely in healthy volunteers and following chronic self-administration in substance users
    Celia J A Morgan
    Clinical Psychopharmacology Unit, University College London, London WC1E 6BT, United Kingdom
    Biol Psychiatry 59:265-72. 2006
    ..As semantic processing deficits are considered central to cognitive impairments in schizophrenia, this study aimed to characterize semantic impairments following both acute and chronic ketamine...
  17. ncbi request reprint Long-term effects of ketamine: evidence for a persisting impairment of source memory in recreational users
    Celia J A Morgan
    Clinical Psychopharmacology Unit, Clinical Health Psychology, University College London, Gower St, London WC1E 6BT, UK
    Drug Alcohol Depend 75:301-8. 2004
    ..Previous research has shown gross generalised verbal memory impairments persisting 3 days after ketamine use in chronic users, however episodic memory has not specifically investigated in this population...
  18. ncbi request reprint Cognitive, dissociative and psychotogenic effects of ketamine in recreational users on the night of drug use and 3 days later
    H V Curran
    Department of Psychology, University College London, UK
    Addiction 95:575-90. 2000
    ..The present study aimed to examine both the acute and residual effects of this drug on cognitive function, dissociation and schizotypal symptomatology in recreational users...
  19. doi request reprint Harms and benefits associated with psychoactive drugs: findings of an international survey of active drug users
    Celia J A Morgan
    UCL Clinical Psychopharmacology Unit, London, UK
    J Psychopharmacol 27:497-506. 2013
    ..It is hoped the results might inform health professionals and educators of what are considered to be both the harms and benefits of psychoactive substances to young people...
  20. ncbi request reprint Greater vulnerability to the amnestic effects of ketamine in males
    Celia J A Morgan
    Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
    Psychopharmacology (Berl) 187:405-14. 2006
    ....
  21. doi request reprint Acute effects of opioids on memory functions of healthy men and women
    James Friswell
    Clinical Psychopharmacology Unit, Clinical Health Psychology, University College London, Gower St, London WC1E 6BT, UK
    Psychopharmacology (Berl) 198:243-50. 2008
    ..However, both anterograde and retrograde memory impairments have been reported following an acute dose of morphine in palliative care patients (Kamboj et al., Pain 117:388-395, 2005)...
  22. ncbi request reprint Perceptual organization in ketamine users: preliminary evidence of deficits on night of drug use but not 3 days later
    Peter J Uhlhaas
    Max Planck Institute for Brain Research, Frankfurt, Germany
    J Psychopharmacol 21:347-52. 2007
    ..Levels of dissociation were also higher in ketamine users only on the night of drug use. These preliminary data provide some support for the role of NMDA-receptor hypofunctioning in dysfunctional coordination of cognitive activity...