2021
Comparison of [11C]UCB-J and [18F]FDG PET in Alzheimer’s disease: A tracer kinetic modeling study
Chen MK, Mecca AP, Naganawa M, Gallezot JD, Toyonaga T, Mondal J, Finnema SJ, Lin SF, O’Dell R, McDonald JW, Michalak HR, Vander Wyk B, Nabulsi NB, Huang Y, Arnsten AF, van Dyck CH, Carson RE. Comparison of [11C]UCB-J and [18F]FDG PET in Alzheimer’s disease: A tracer kinetic modeling study. Cerebrovascular And Brain Metabolism Reviews 2021, 41: 2395-2409. PMID: 33757318, PMCID: PMC8393289, DOI: 10.1177/0271678x211004312.Peer-Reviewed Original ResearchConceptsSynaptic densityMedial temporal regionsAlzheimer's diseaseNeocortical regionsTemporal regionsRelative outcome measuresMedial temporal lobeVivo PET imagingJ bindingOutcome measuresTemporal lobeMagnitude of reductionCN participantsBrain regionsAD participantsDiseasePET imagingConcordant reductionNormal participantsSynaptic vesiclesPerfusionMetabolismSuitable markerParticipantsSimilar pattern
2020
In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET
Mecca AP, Chen M, O'Dell RS, Naganawa M, Toyonaga T, Godek TA, Harris JE, Bartlett HH, Zhao W, Nabulsi NB, Vander Wyk B, Varma P, Arnsten AFT, Huang Y, Carson RE, van Dyck C. In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET. Alzheimer's & Dementia 2020, 16: 974-982. PMID: 32400950, PMCID: PMC7383876, DOI: 10.1002/alz.12097.Peer-Reviewed Original ResearchConceptsWidespread synaptic lossEarly Alzheimer's diseaseSynaptic lossAlzheimer's diseaseSynaptic vesicle glycoprotein 2AGray matter volumeMajor structural correlatePositron emission tomography (PET) imagingEmission Tomography ImagingDistribution volume ratioCerebellar reference regionNeocortical brain regionsSynaptic densityAD progressionConsistent pathologyPotential therapyMatter volumePromising biomarkerCognitive impairmentCN participantsBrain regionsDiseaseTomography imagingNormal participantsStructural correlates
2016
Intranasal Oxytocin Enhances Connectivity in the Neural Circuitry Supporting Social Motivation and Social Perception in Children with Autism
Gordon I, Jack A, Pretzsch CM, Vander Wyk B, Leckman JF, Feldman R, Pelphrey KA. Intranasal Oxytocin Enhances Connectivity in the Neural Circuitry Supporting Social Motivation and Social Perception in Children with Autism. Scientific Reports 2016, 6: 35054. PMID: 27845765, PMCID: PMC5109935, DOI: 10.1038/srep35054.Peer-Reviewed Original ResearchConceptsAutism spectrum disorderIntranasal oxytocinSocial motivationSocial perceptionSocial-emotional informationFunctional magnetic resonance imagingPlacebo-controlled crossover designBiological motionSocial stimuliAngry voicesSocial deficitsSpectrum disorderOT administrationMesolimbic reward pathwayBehavioral treatmentBrain rewardReduced connectivityBrain regionsReward pathwayCortical sitesRewardPerceptionMotivationOxytocinBrain sites
2012
Neural Mechanisms of Improvements in Social Motivation After Pivotal Response Treatment: Two Case Studies
Voos AC, Pelphrey KA, Tirrell J, Bolling DZ, Wyk B, Kaiser MD, McPartland JC, Volkmar FR, Ventola P. Neural Mechanisms of Improvements in Social Motivation After Pivotal Response Treatment: Two Case Studies. Journal Of Autism And Developmental Disorders 2012, 43: 1-10. PMID: 23104615, PMCID: PMC4999079, DOI: 10.1007/s10803-012-1683-9.Peer-Reviewed Original ResearchConceptsPivotal Response TreatmentAutism spectrum disorderSocial stimuliResponse treatmentFunctional magnetic resonance imagingYoung childrenNeural correlatesSocial motivationSocial skillsSocial perceptionNeural mechanismsNeural responsesBehavioral measuresSpectrum disorderSocial communicationBehavioral treatmentEye trackingNeural systemsAdaptive behaviorBrain regionsBaseline measuresStriking gainsStimuliChildrenPositive effect
2010
Brain mechanisms for representing what another person sees
Heyda RD, Green SR, Vander Wyk B, Morris JP, Pelphrey KA. Brain mechanisms for representing what another person sees. NeuroImage 2010, 50: 693-700. PMID: 20056152, PMCID: PMC2824003, DOI: 10.1016/j.neuroimage.2009.12.101.Peer-Reviewed Original ResearchConceptsExtrastriate body areaParahippocampal place areaFunctional magnetic resonance imagingSocial cognitionVisual attentionDual-role hypothesisAttribution hypothesisPerson's visual attentionWhole-brain analysisSocial brainStimulus categoriesBrain mechanismsPlace areaVisible stimuliVisual regionsSame stimuliBrain regionsInterest analysisCognitionStimuliParticipants' viewsSpecific categoriesMagnetic resonance imagingExtrastriateHypothesis