2011
The Effects of Stimulant Medication on Working Memory Functional Connectivity in Attention-Deficit/Hyperactivity Disorder
Wong CG, Stevens MC. The Effects of Stimulant Medication on Working Memory Functional Connectivity in Attention-Deficit/Hyperactivity Disorder. Biological Psychiatry 2011, 71: 458-466. PMID: 22209640, PMCID: PMC4120250, DOI: 10.1016/j.biopsych.2011.11.011.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderFunctional magnetic resonance imagingFunctional connectivityFMRI taskHyperactivity disorderStimulant medicationNetwork engagementMemory fMRI taskFrontoparietal brain networksBrain regionsFrontoparietal brain regionsConnectivity changesMemory reaction timeVentrolateral prefrontal cortexAdditional brain regionsGroup independent component analysisMedication-related changesFunctional connectivity analysisRegional functional connectivityFunctional connectivity changesMemory performanceRepeated-measures t-testBrain activationIndependent component analysisRetrieval phase
2009
Evidence for Anomalous Network Connectivity during Working Memory Encoding in Schizophrenia: An ICA Based Analysis
Meda SA, Stevens MC, Folley BS, Calhoun VD, Pearlson GD. Evidence for Anomalous Network Connectivity during Working Memory Encoding in Schizophrenia: An ICA Based Analysis. PLOS ONE 2009, 4: e7911. PMID: 19936244, PMCID: PMC2775682, DOI: 10.1371/journal.pone.0007911.Peer-Reviewed Original ResearchConceptsTask accuracyFunctional connectivityPrefrontal cortexNetwork engagementLeft fronto-parietal networkRight dorsolateral prefrontal cortexMemory fMRI paradigmWorking Memory EncodingFronto-parietal networkVentrolateral prefrontal cortexNumerous neuroimaging studiesDorsolateral prefrontal cortexIndependent component analysisAbnormal regional brain activityDefault mode networkBrain network integrationDysfunctional brain regionsPrevious schizophrenia studiesRegional brain activityHippocampus/parahippocampusMemory encodingFMRI taskMemory cognitionMemory performanceFMRI paradigm
2007
Functional neural networks underlying response inhibition in adolescents and adults
Stevens MC, Kiehl KA, Pearlson GD, Calhoun VD. Functional neural networks underlying response inhibition in adolescents and adults. Behavioural Brain Research 2007, 181: 12-22. PMID: 17467816, PMCID: PMC2266817, DOI: 10.1016/j.bbr.2007.03.023.Peer-Reviewed Original ResearchConceptsResponse inhibition circuitsBehavioral performance changesBrain hemodynamic activityResponse inhibitionFronto-striatal regionsThalamic modulationThalamic connectivityAge-related differencesPremotor cortexHealthy adolescentsGo/No-Go taskNeural circuitsHemodynamic activityEffective connectivity analysisInhibition circuitAdultsFunctional neural networksResponse suppressionAdolescentsConnectivity analysisFirst descriptionInhibitionNetwork engagement