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R. Kahn · SciRah

Researcher profile · Semantic Scholar

R. Kahn

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R. Kahn — researcher profile on SciRah

h-index: 45
Works: 167
Citations: 9,283

Most-cited papers

Schizophrenia is a cognitive illness: time for a change in focus.
R. Kahn, R. Keefe
2013JAMA psychiatry832 citations
Semantic Scholar
Microglia activation in recent-onset schizophrenia: a quantitative (R)-[11C]PK11195 positron emission tomography study.
B. N. van Berckel, M. Bossong, R. Boellaard, R. Kloet +7 more
2008Biological Psychiatry576 citations
Semantic Scholar
Δ9-Tetrahydrocannabinol Induces Dopamine Release in the Human Striatum
M. Bossong, B. N. van Berckel, R. Boellaard, L. Zuurman +6 more
2009Neuropsychopharmacology259 citations
Semantic Scholar
Delta 9-tetrahydrocannabinol induces dopamine release in the human striatum
M. Bossong, B. N. van Berckel, R. Boellaard, L. Zuurman +6 more
2008188 citations
Semantic Scholar
Amisulpride and olanzapine followed by open-label treatment with clozapine in first-episode schizophrenia and schizophreniform disorder (OPTiMiSE): a three-phase switching study.
R. Kahn, Inge Winter-van Rossum, S. Leucht, P. McGuire +61 more
2018Lancet psychiatry177 citations Open access
Semantic Scholar
Long-term effects of frequent cannabis use on working memory and attention: an fMRI study
G. Jager, R. Kahn, W. van den Brink, J. M. van Ree +1 more
2006Psychopharmacology176 citations
Semantic Scholar
Effects of frequent cannabis use on hippocampal activity during an associative memory task.
G. Jager, H. van Hell, M. D. de Win, R. Kahn +3 more
2007European Neuropsychopharmacology170 citations
Semantic Scholar
Enhanced dopamine transporter density in psychotropic-naive patients with obsessive-compulsive disorder shown by [123I]{beta}-CIT SPECT.
N. V. D. van der Wee, H. Stevens, J. A. Hardeman, R. Mandl +4 more
2004American Journal of Psychiatry160 citations
Semantic Scholar
Catatonia: Disappeared or Under-Diagnosed?
F. M. van der Heijden, S. Tuinier, N. Arts, M. Hoogendoorn +2 more
2005Psychopathology152 citations
Semantic Scholar
Further human evidence for striatal dopamine release induced by administration of Δ9-tetrahydrocannabinol (THC): selectivity to limbic striatum
M. Bossong, M. Mehta, B. N. van Berckel, O. Howes +2 more
2015Psychopharmacology136 citations Open access
Semantic Scholar
Effects of Typical and Atypical Antipsychotics on the Prepulse Inhibition of the Startle Reflex in Patients With Schizophrenia
B. Oranje, C. V. van Oel, C. G. Gispen-de Wied, M. Verbaten +1 more
2002Journal of Clinical Psychopharmacology107 citations
Semantic Scholar
Effects of Olanzapine Combined With Samidorphan on Weight Gain in Schizophrenia: A 24-Week Phase 3 Study.
C. Correll, J. Newcomer, B. Silverman, Lauren DiPetrillo +7 more
2020American Journal of Psychiatry103 citations
Semantic Scholar
Modulating sensory gating in healthy volunteers: the effects of ketamine and haloperidol.
B. Oranje, C. G. Gispen-de Wied, M. Verbaten, R. Kahn
2002Biological Psychiatry102 citations
Semantic Scholar
Neuroendocrine evidence for serotonin receptor hypersensitivity in panic disorder
R. Kahn, G. Asnis, S. Wetzler, H. V. van Praag
2004Psychopharmacology94 citations
Semantic Scholar
Effects of δ9-tetrahydrocannabinol on human working memory function.
M. Bossong, J. Jansma, H. van Hell, G. Jager +4 more
2012Biological Psychiatry87 citations Open access
Semantic Scholar
Assessment of Cognitive Brain Function in Ecstasy Users and Contributions of Other Drugs of Abuse: Results from an fMRI Study
G. Jager, M. D. de Win, I. van der Tweel, T. Schilt +4 more
2008Neuropsychopharmacology83 citations
Semantic Scholar
The endocannabinoid system and emotional processing: a pharmacological fMRI study with ∆9-tetrahydrocannabinol.
M. Bossong, H. van Hell, G. Jager, R. Kahn +2 more
2013European Neuropsychopharmacology81 citations Open access
Semantic Scholar
On the Origins of Schizophrenia.
R. Kahn
2020American Journal of Psychiatry69 citations
Semantic Scholar
Default Mode Network in the Effects of Δ9-Tetrahydrocannabinol (THC) on Human Executive Function
M. Bossong, J. Jansma, H. van Hell, G. Jager +2 more
2013PLoS ONE69 citations Open access
Semantic Scholar
Effects of Δ9-Tetrahydrocannabinol Administration on Human Encoding and Recall Memory Function: A Pharmacological fMRI Study
M. Bossong, G. Jager, H. van Hell, L. Zuurman +5 more
2012Journal of Cognitive Neuroscience58 citations Open access
Semantic Scholar
Incidental use of ecstasy: no evidence for harmful effects on cognitive brain function in a prospective fMRI study
G. Jager, M. D. de Win, H. Vervaeke, T. Schilt +4 more
2007Psychopharmacology54 citations Open access
Semantic Scholar
Evidence for involvement of the insula in the psychotropic effects of THC in humans: a double-blind, randomized pharmacological MRI study.
H. van Hell, M. Bossong, G. Jager, G. Kristo +4 more
2011International Journal of Neuropsychopharmacology53 citations Open access
Semantic Scholar
Atypical antipsychotics and the relevance of glutamate and serotonin.
F. M. van der Heijden, S. Tuinier, D. Fekkes, A. Sijben +2 more
2004European Neuropsychopharmacology48 citations
Semantic Scholar
Movement disorders in nonpsychotic siblings of patients with nonaffective psychosis.
J. Koning, R. Kahn, D. Tenback, L. V. van Schelven +1 more
2011Psychiatry Research47 citations
Semantic Scholar
Spatial working memory in obsessive-compulsive disorder improves with clinical response: A functional MRI study.
N. V. D. van der Wee, N. Ramsey, H. V. van Megen, D. Denys +2 more
2007European Neuropsychopharmacology47 citations
Semantic Scholar
Absence of cerebrospinal fluid antineuronal antibodies in schizophrenia spectrum disorders
T. Oviedo-Salcedo, L. de Witte, T. Kümpfel, R. Kahn +4 more
2018British Journal of Psychiatry45 citations Open access
Semantic Scholar
The Effect of Olanzapine Treatment on m-Chlorophenylpiperazine-Induced Hormone Release in Schizophrenia
Floortje E. Scheepers, C. G. Gispen-de Wied, R. Kahn
2001Journal of Clinical Psychopharmacology39 citations
Semantic Scholar
The Effect of Olanzapine Treatment on Monoamine Metabolite Concentrations in the Cerebrospinal Fluid of Schizophrenic Patients
Floortje E. Scheepers, C. G. Gispen-de Wied, H. Westenberg, R. Kahn
2001Neuropsychopharmacology39 citations
Semantic Scholar
Amino acids in schizophrenia: evidence for lower tryptophan availability during treatment with atypical antipsychotics?
F. M. van der Heijden, D. Fekkes, S. Tuinier, A. Sijben +2 more
2005Journal of neural transmission37 citations
Semantic Scholar
Saccadic abnormalities in psychotropic-naive obsessive–compulsive disorder without co-morbidity
N. V. D. van der Wee, Hans H. Hardeman, N. Ramsey, M. Raemaekers +4 more
2006Psychological Medicine33 citations
Semantic Scholar
Recognition of early warning signs in patients with schizophrenia: a review of the literature.
B. van Meijel, M. van der Gaag, R. Kahn, M. Grypdonck
2004International Journal of Mental Health Nursing33 citations
Semantic Scholar
Faculty Opinions recommendation of A primate-specific, brain isoform of KCNH2 affects cortical physiology, cognition, neuronal repolarization and risk of schizophrenia.
R. Kahn
200930 citations
Semantic Scholar
Increasing Dopaminergic Activity: Effects of L-Dopa and Bromocriptine on Human Sensory Gating
B. Oranje, C. G. Gispen-de Wied, H. Westenberg, C. Kemner +2 more
2004Journal of Psychopharmacology29 citations
Semantic Scholar
Polymorphisms in catechol-O-methyltransferase and methylenetetrahydrofolate reductase in relation to the risk of schizophrenia.
J. Muntjewerff, H. Gellekink, M. den Heijer, M. Hoogendoorn +3 more
2008European Neuropsychopharmacology28 citations
Semantic Scholar
Treatment of depression in first episode of schizophrenia: results from EUFEST.
J. Rybakowski, K. Vansteelandt, T. Szafrański, E. Thys +4 more
2012European Neuropsychopharmacology27 citations
Semantic Scholar
Haloperidol counteracts the ketamine-induced disruption of processing negativity, but not that of the P300 amplitude.
B. Oranje, C. G. Gispen-de Wied, H. Westenberg, C. Kemner +2 more
2009International Journal of Neuropsychopharmacology27 citations Open access
Semantic Scholar
No effects of l-dopa and bromocriptine on psychophysiological parameters of human selective attention
B. Oranje, C. G. Gispen-de Wied, H. Westenberg, C. Kemner +2 more
2006Journal of Psychopharmacology24 citations Open access
Semantic Scholar
Cognitive Decline and Disrupted Cognitive Trajectory in Schizophrenia.
R. Keefe, R. Kahn
2017JAMA psychiatry23 citations
Semantic Scholar
Acute effects of ∆9-tetrahydrocannabinol (THC) on resting state brain function and their modulation by COMT genotype.
M. Bossong, H. van Hell, C. Schubart, W. van Saane +7 more
2019European Neuropsychopharmacology22 citations Open access
Semantic Scholar
d-Cycloserine Addition to Exposure Sessions in the Treatment of Patients With Obsessive-Compulsive Disorder
A. D. de Leeuw, H. V. van Megen, R. Kahn, H. Westenberg
2017European psychiatry21 citations
Semantic Scholar
ROM: gedragsnorm of dwangmaatregel? Overwegingen bij het themanummer over routine outcome monitoring
J. van Os, R. Kahn, D. Denys, R. Schoevers +7 more
201221 citations
Semantic Scholar
Nonschizophrenic Psychotic Disorders: The Case of Cycloid Psychoses
F. M. van der Heijden, S. Tuinier, R. Kahn, W. M. Verhoeven
2004Psychopathology21 citations
Semantic Scholar
On the Specificity of Continuous Cognitive Decline in Schizophrenia.
R. Kahn
2019American Journal of Psychiatry19 citations
Semantic Scholar
Duration of untreated psychosis and response to treatment: an analysis of response in the OPTiMiSE cohort.
L. Levi, Mor Bar Haim, S. Burshtein, Inge Winter-van Rossum +5 more
2020European Neuropsychopharmacology18 citations
Semantic Scholar
How antipsychotics impact the different dimensions of Schizophrenia: a test of competing hypotheses.
T. Marques, S. Levine, A. Reichenberg, R. Kahn +4 more
2014European Neuropsychopharmacology17 citations
Semantic Scholar
Haloperidol and clozapine treatment and their effect onM-chlorophenylpiperazine-mediated responses in schizophrenia: implications for the mechanism of action of clozapine
R. Kahn, L. Siever, M. Davidson, C. Greenwald +1 more
2005Psychopharmacology13 citations
Semantic Scholar
Relapse prevention in patients with schizophrenia: the application of an intervention protocol in nursing practice.
B. van Meijel, M. van der Gaag, R. Kahn, M. Grypdonck
2003Archives of Psychiatric Nursing13 citations
Semantic Scholar
The Salience of Reward.
M. Bossong, R. Kahn
2016JAMA psychiatry10 citations Open access
Semantic Scholar
Symptom Remission and Brain Cortical Networks at First Clinical Presentation of Psychosis: The OPTiMiSE Study.
P. Dazzan, A. Lawrence, A. Reinders, A. Egerton +28 more
2020Schizophrenia bulletin9 citations Open access
Semantic Scholar
Microglia activation in schizophrenia
T. F. van der Doef, M. Bossong, R. Boellaard, M. Yaqub +8 more
2010NeuroImage9 citations
Semantic Scholar

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M. Bossong×12
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G. Jager×10
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H. van Hell×7
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C. G. Gispen-de Wied

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B. Oranje — researcher profile on SciRah

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