2013
The role of top-down control in different phases of a sensorimotor timing task: a DCM study of adults and adolescents
Witt ST, Stevens MC. The role of top-down control in different phases of a sensorimotor timing task: a DCM study of adults and adolescents. Brain Imaging And Behavior 2013, 7: 260-273. PMID: 23475755, PMCID: PMC3743949, DOI: 10.1007/s11682-013-9224-5.Peer-Reviewed Original ResearchConceptsPrefrontal cortexLow-level sensorySignificant maturational effectsVentrolateral prefrontal cortexDynamic causal modelingInternal clock mechanismFinger-tapping taskCognitive controlSensorimotor timingBehavioral accuracyAuditory cuesTiming taskFMRI studyBaseline connectivitySensory regionsCognitive functionDCM studySensory stimuliCausal modelingAuditory cortexMotor regionsCuesBrain regionsAccurate performanceMotor control
2012
RETRACTED: Where, when, how high, and how long? The hemodynamics of emotional response in psychotropic-naïve patients with adolescent bipolar disorder.
Wegbreit E, Passarotti AM, Ellis JA, Wu M, Witowski N, Fitzgerald JM, Stevens MC, Pavuluri MN. RETRACTED: Where, when, how high, and how long? The hemodynamics of emotional response in psychotropic-naïve patients with adolescent bipolar disorder. Journal Of Affective Disorders 2012, 147: 304-311. PMID: 23261134, PMCID: PMC3606663, DOI: 10.1016/j.jad.2012.11.025.Peer-Reviewed Original ResearchConceptsFearful facesPrefrontal cortexNeutral facesRight dorsolateral prefrontal cortexEmotion-attention interactionsEnhanced neural processingVentrolateral prefrontal cortexEmotional processing regionsDorsolateral prefrontal cortexAdolescent bipolar disorderProbe taskEmotional facesPrefrontal activityNeural processingSpaced stimuliABD groupEmotional responsesProcessing regionsBilateral amygdalaDisorder exhibitMixed mood statesMood statesHealthy controlsNeural activityBipolar disorder exhibitReduced Functional Connectivity of Prefrontal Regions and Amygdala Within Affect and Working Memory Networks in Pediatric Bipolar Disorder
Passarotti AM, Ellis J, Wegbreit E, Stevens MC, Pavuluri MN. Reduced Functional Connectivity of Prefrontal Regions and Amygdala Within Affect and Working Memory Networks in Pediatric Bipolar Disorder. Brain Connectivity 2012, 2: 320-334. PMID: 23035965, PMCID: PMC3621331, DOI: 10.1089/brain.2012.0089.Peer-Reviewed Original ResearchConceptsVentrolateral prefrontal cortexPediatric bipolar disorderRight ventrolateral prefrontal cortexWorking Memory NetworkFunctional connectivityMemory taskDorsolateral PFCBrain networksRight amygdalaMemory networkEmotion processing regionsEmotion regulation regionsDifferential functional connectivityFunctional magnetic resonanceBilateral temporal regionsConnected brain networksRegulation regionRegional functional connectivityNeutral facesEmotion processingCognitive processesEmotion evaluationPrefrontal regionsProcessing regionsBipolar disorder
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