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
Neural Activations During Auditory Oddball Processing Discriminating Schizophrenia and Psychotic Bipolar Disorder
Ethridge LE, Hamm JP, Shapiro JR, Summerfelt AT, Keedy SK, Stevens MC, Pearlson G, Tamminga CA, Boutros NN, Sweeney JA, Keshavan MS, Thaker G, Clementz BA. Neural Activations During Auditory Oddball Processing Discriminating Schizophrenia and Psychotic Bipolar Disorder. Biological Psychiatry 2012, 72: 766-774. PMID: 22572033, PMCID: PMC3465513, DOI: 10.1016/j.biopsych.2012.03.034.Peer-Reviewed Original ResearchConceptsAuditory oddball taskBipolar disorderNeural responsesBest differentiated groupsSingular time pointsDifferent psychotic disordersAuditory processing abnormalitiesOddball taskPsychotic bipolar disorderP300 event-related potentialNonpsychotic patientsHealthy subjectsPsychotic disordersPsychosis groupAuditory oddball responsePsychotic groupSchizophreniaFrequent combinationTime pointsBrain activationNeural activationBeta activityGroup differencesBrain responsesDisorders
2011
Spatiotemporal and frequency domain analysis of auditory paired stimuli processing in schizophrenia and bipolar disorder with psychosis
Hamm JP, Ethridge LE, Shapiro JR, Stevens MC, Boutros NN, Summerfelt AT, Keshavan MS, Sweeney JA, Pearlson G, Tamminga CA, Thaker G, Clementz BA. Spatiotemporal and frequency domain analysis of auditory paired stimuli processing in schizophrenia and bipolar disorder with psychosis. Psychophysiology 2011, 49: 522-530. PMID: 22176721, PMCID: PMC3309114, DOI: 10.1111/j.1469-8986.2011.01327.x.Peer-Reviewed Original Research
2010
Decreased prefrontal cortex activity in mild traumatic brain injury during performance of an auditory oddball task
Witt ST, Lovejoy DW, Pearlson GD, Stevens MC. Decreased prefrontal cortex activity in mild traumatic brain injury during performance of an auditory oddball task. Brain Imaging And Behavior 2010, 4: 232-247. PMID: 20703959, DOI: 10.1007/s11682-010-9102-3.Peer-Reviewed Original ResearchConceptsMild TBI patientsMild traumatic brain injuryTraumatic brain injuryBrain activityRight dorsolateral prefrontal cortexActive information maintenanceCompensatory brain activityDefault mode network dysfunctionPrefrontal cortex activityAuditory oddball taskDorsolateral prefrontal cortexTBI patientsPersistent cognitive deficitsBrain injurySimilar topographical patternEffortful formsExecutive tasksExecutive abilitiesOddball taskTask performanceMental effortNovel stimuliStimulus detectionCortex activityPrefrontal cortex
2007
An fMRI Auditory Oddball Study of Combined-Subtype Attention Deficit Hyperactivity Disorder
Stevens MC, Pearlson GD, Kiehl KA. An fMRI Auditory Oddball Study of Combined-Subtype Attention Deficit Hyperactivity Disorder. American Journal Of Psychiatry 2007, 164: 1737-1749. PMID: 17974940, DOI: 10.1176/appi.ajp.2007.06050876.Peer-Reviewed Original ResearchMeSH KeywordsAcoustic StimulationAdolescentAdolescent BehaviorAttentionAttention Deficit Disorder with HyperactivityAuditory PerceptionBrainBrain MappingCerebral CortexChildCognition DisordersDiagnostic and Statistical Manual of Mental DisordersEvoked PotentialsHemodynamicsHumansMagnetic Resonance ImagingMaleMemory DisordersOrientationOxygenPsychiatric Status Rating ScalesPsychomotor PerformanceConceptsAttention deficit hyperactivity disorderEvent-related potentialsFunctional magnetic resonance imagingDeficit hyperactivity disorderBrain regionsHyperactivity disorderHemodynamic activityThree-stimulus auditory oddball taskP3 event-related potentialEvent-related fMRI dataProcessing of targetsAbnormal hemodynamic activityWorking Memory DeficitsSlower task performanceAuditory oddball taskNovel environmental stimuliCortical brain regionsAttentional orientingOrient attentionADHD participantsCognitive processesCognitive representationsOddball studiesNeurobiological theoriesOddball stimuli
2005
Semi-blind ICA of fMRI: A method for utilizing hypothesis-derived time courses in a spatial ICA analysis
Calhoun VD, Adali T, Stevens MC, Kiehl KA, Pekar JJ. Semi-blind ICA of fMRI: A method for utilizing hypothesis-derived time courses in a spatial ICA analysis. NeuroImage 2005, 25: 527-538. PMID: 15784432, DOI: 10.1016/j.neuroimage.2004.12.012.Peer-Reviewed Original ResearchMeSH KeywordsAuditory PerceptionBrainHumansMagnetic Resonance ImagingPrincipal Component AnalysisTimeConceptsPrior informationIndependent component analysisData analysis applicationsSemi-blind independent component analysisData-driven approachThree-stimulus auditory oddball paradigmTemporal constraintsAnalysis applicationsICA analysisTime-course informationFlexible wayPresence of noiseCourse informationRegression approachSimulation resultsBlind source separation techniqueExplicit constraintsFlexible modeling approachFMRI dataSource separation techniquesInformationUseful applicationsHigher order statistical momentsModeling approachNegative associates