2017
Posterior dopamine D2/3 receptors and brain network functional connectivity
Nagano‐Saito A, Lissemore J, Gravel P, Leyton M, Carbonell F, Benkelfat C. Posterior dopamine D2/3 receptors and brain network functional connectivity. Synapse 2017, 71 PMID: 28700819, DOI: 10.1002/syn.21993.Peer-Reviewed Original ResearchConceptsDefault mode networkNetwork functional connectivityFunctional connectivity strengthPositron emission tomographyFunctional connectivityPosterior portionReceptor distributionPosteromedial cortexResting-state functional magnetic resonance imagingConnectivity strengthBrain network functional connectivityPosterior default mode networkMode networkDopamine D2/3 receptorsDopamine receptor distributionResting-state connectivityBrain networksFunctional magnetic resonance imagingMagnetic resonance imagingMultiple brain networksFallypride bindingDorsal attention networkMean BPBrain dopamineD2/3 receptors
2016
Cocaine cue–induced dopamine release in the human prefrontal cortex
Milella M, Fotros A, Gravel P, Casey K, Larcher K, Verhaeghe J, Cox S, Reader A, Dagher A, Benkelfat C, Leyton M. Cocaine cue–induced dopamine release in the human prefrontal cortex. Journal Of Psychiatry And Neuroscience 2016, 41: 322-330. PMID: 26900792, PMCID: PMC5008921, DOI: 10.1503/jpn.150207.Peer-Reviewed Original ResearchMeSH KeywordsAdultBenzamidesBrain MappingCocaineCocaine-Related DisordersCorpus StriatumCravingCuesDopamineDopamine D2 Receptor AntagonistsDopamine Uptake InhibitorsFemaleFluorine RadioisotopesHumansMagnetic Resonance ImagingMaleMiddle AgedNeuropsychological TestsPositron-Emission TomographyPrefrontal CortexRadiopharmaceuticalsConceptsDA releaseMedial orbitofrontal cortexPrefrontal cortexDrug-related cuesDopamine releaseHuman prefrontal cortexOrbitofrontal cortexCortical DA releasePresence of autoreceptorsDA cell bodiesD2 receptor levelsD2/3 receptor availabilityCurrent cocaine dependencePositron emission tomographyCocaine use disorderDorsolateral prefrontal cortexSelf-reported cravingStriatal changesHigh-resolution positron emission tomographyReceptor levelsSeparate regulatory mechanismsStriatal regionsDA responseUse disordersReceptor availability
2013
Grey matter density and GABAA binding potential show a positive linear relationship across cortical regions
Duncan N, Gravel P, Wiebking C, Reader A, Northoff G. Grey matter density and GABAA binding potential show a positive linear relationship across cortical regions. Neuroscience 2013, 235: 226-231. PMID: 23380503, DOI: 10.1016/j.neuroscience.2012.12.075.Peer-Reviewed Original Research
2012
3D PET image reconstruction including both motion correction and registration directly into an MR or stereotaxic spatial atlas
Gravel P, Verhaeghe J, Reader A. 3D PET image reconstruction including both motion correction and registration directly into an MR or stereotaxic spatial atlas. Physics In Medicine And Biology 2012, 58: 105-126. PMID: 23221063, DOI: 10.1088/0031-9155/58/1/105.Peer-Reviewed Original ResearchExternal awareness and GABA—A multimodal imaging study combining fMRI and [18F]flumazenil‐PET
Wiebking C, Duncan N, Qin P, Hayes D, Lyttelton O, Gravel P, Verhaeghe J, Kostikov A, Schirrmacher R, Reader A, Bajbouj M, Northoff G. External awareness and GABA—A multimodal imaging study combining fMRI and [18F]flumazenil‐PET. Human Brain Mapping 2012, 35: 173-184. PMID: 22996793, PMCID: PMC6869063, DOI: 10.1002/hbm.22166.Peer-Reviewed Original ResearchConceptsNeuronal activity changesInhibitory neurotransmitter GABANegative BOLD responseFunctional magnetic resonance imaging paradigmCortical midline regionsSame healthy subjectsGABAA receptorsHealthy subjectsNeurotransmitter GABAPsychiatric disordersBiochemical mechanismsPET imagingExtrinsic systemMidline regionBOLD responseExternal awarenessNeuronal networksUnderlying neuronal networksImaging paradigmGABAActivity changesStimulus typeSame paradigmAwarenessPrecuneus
2011
Brain Regionalα-[11C]Methyl-L-Tryptophan Trapping in Medication-Free Patients With Obsessive-Compulsive Disorder
Berney A, Leyton M, Gravel P, Sibon I, Sookman D, Neto P, Diksic M, Nakai A, Pinard G, Todorov C, Okazawa H, Blier P, Nordahl T, Benkelfat C. Brain Regionalα-[11C]Methyl-L-Tryptophan Trapping in Medication-Free Patients With Obsessive-Compulsive Disorder. JAMA Psychiatry 2011, 68: 732-741. PMID: 21383250, PMCID: PMC3677917, DOI: 10.1001/archgenpsychiatry.2011.16.Peer-Reviewed Original ResearchConceptsL-tryptophan trappingObsessive-compulsive disorderMedication-free patientsHealthy controlsMcGill University Health CentreGlucose metabolic disturbancesAdults meeting criteriaMain outcome measuresUniversity Health CentrePositron emission tomographyDepartment of PsychiatryStatistical parametric mappingTemporal lobe activityMontreal Neurological InstituteSerotonergic componentReuptake inhibitorsSerotonin dysfunctionClinical efficacySerotonergic abnormalitiesMetabolic disturbancesPostsynaptic changesSymptomatic stateSerotonergic systemHealth centersOutcome measures
2010
Where in-vivo imaging meets cytoarchitectonics: The relationship between cortical thickness and neuronal density measured with high-resolution [18F]flumazenil-PET
la Fougère C, Grant S, Kostikov A, Schirrmacher R, Gravel P, Schipper H, Reader A, Evans A, Thiel A. Where in-vivo imaging meets cytoarchitectonics: The relationship between cortical thickness and neuronal density measured with high-resolution [18F]flumazenil-PET. NeuroImage 2010, 56: 951-960. PMID: 21073964, DOI: 10.1016/j.neuroimage.2010.11.015.Peer-Reviewed Original ResearchMeSH KeywordsAgedAlgorithmsBrain MappingCerebral CortexData Interpretation, StatisticalFemaleFlumazenilGABA ModulatorsHumansImage Processing, Computer-AssistedIndividualityIsotope LabelingMagnetic Resonance ImagingMaleMiddle AgedNeuronsPositron-Emission TomographyRadiopharmaceuticalsReceptors, GABARegression AnalysisConceptsNeuronal densityCortical thicknessAxo-dendritic synapsesSensory-motor cortexHuman brain areasDifferent cytoarchitectonic areasFlumazenil PETMotor cortexApparent cortical thicknessCortical thickness mapsHealthy subjectsBrain areasMorphometry studyCytoarchitectonic areasCortical morphologyCortical regionsCortical distributionVivo studiesFMZReceptor complexPartial volume correctionCytoarchitectonicsSensitive toolDifferential relationshipsSubset
2008
Decreased [18F]MPPF Binding Potential in the Dorsal Raphe Nucleus After a Single Oral Dose of Fluoxetine: A Positron-Emission Tomography Study in Healthy Volunteers
Sibon I, Benkelfat C, Gravel P, Aznavour N, Costes N, Mzengeza S, Booij L, Baker G, Soucy J, Zimmer L, Descarries L. Decreased [18F]MPPF Binding Potential in the Dorsal Raphe Nucleus After a Single Oral Dose of Fluoxetine: A Positron-Emission Tomography Study in Healthy Volunteers. Biological Psychiatry 2008, 63: 1135-1140. PMID: 18191817, DOI: 10.1016/j.biopsych.2007.11.016.Peer-Reviewed Original ResearchMeSH KeywordsAdministration, OralAdultAntidepressive Agents, Second-GenerationAutoreceptorsBrainDouble-Blind MethodFluorine RadioisotopesFluoxetineHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMalePiperazinesPositron-Emission TomographyPyridinesRaphe NucleiReceptor, Serotonin, 5-HT1AReference Values