Celia Ja Morgan

Summary

Affiliation: University College London
Country: UK

Publications

  1. ncbi 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. ncbi 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
  3. ncbi 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
  4. ncbi 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
  5. ncbi 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
  6. ncbi 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
  7. ncbi 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
  8. ncbi 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
  9. ncbi 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
  10. ncbi 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

Collaborators

Detail Information

Publications19

  1. ncbi 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. ncbi 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...
  3. ncbi 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...
  4. ncbi 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...
  5. ncbi 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...
  6. ncbi 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...
  7. ncbi 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...
  8. ncbi 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
    ..FUTURE TRENDS: An important aim of future research should be to detail the specificity of ketamine's amnestic effects on both a neuropharmacological and a cognitive level...
  9. ncbi 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...
  10. ncbi 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...
  11. ncbi 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 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...
  13. ncbi 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...
  14. ncbi 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...
  15. ncbi 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...
  16. ncbi 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...
  17. ncbi 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)...
  18. ncbi 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
    ..Possible explanations of these findings are neuroanatomical and cognitive differences in processing of words in men and women and interactions between sex hormones and NMDA-R function...
  19. ncbi 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...