2015
A preliminary study of the effects of working memory training on brain function
Stevens MC, Gaynor A, Bessette KL, Pearlson GD. A preliminary study of the effects of working memory training on brain function. Brain Imaging And Behavior 2015, 10: 387-407. PMID: 26138580, PMCID: PMC4698365, DOI: 10.1007/s11682-015-9416-2.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderWM trainingMemory trainingBrain regionsDifferent neural correlatesBrain functionADHD symptom severityTraining-related changesTemporal lobe regionsDifferent symptom typesWM abilityExecutive processingWM performanceFMRI taskFrontoparietal circuitsNeural correlatesBrain activationHyperactivity disorderNeuropsychological testsNeural changesBrain activityTask phasesLobe regionsActivation gainControl participants
2014
Brain activity in predominantly-inattentive subtype attention-deficit/hyperactivity disorder during an auditory oddball attention task
Orinstein AJ, Stevens MC. Brain activity in predominantly-inattentive subtype attention-deficit/hyperactivity disorder during an auditory oddball attention task. Psychiatry Research 2014, 223: 121-128. PMID: 24953999, PMCID: PMC4120259, DOI: 10.1016/j.pscychresns.2014.05.012.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderAttention taskADHD subtypesHyperactivity disorderNovel stimuliBrain activityMemory-related cognitive processesPrevious functional neuroimaging studiesBilateral superior temporal gyrusRight posterior parietal cortexNumerous cognitive tasksFunctional neuroimaging studiesInfrequent target stimuliAge-matched control participantsSuperior temporal gyrusPosterior parietal cortexTemporal lobe structuresGreater hemodynamic activityAttentional orientingCognitive processesCognitive tasksTarget stimuliInattentive subtypeLateral temporal lobe structuresAttention deficits
2012
Reduced 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