2009
Reperfusion normalizes motor activation patterns in large‐vessel disease
Chmayssani M, Lazar RM, Hirsch J, Marshall RS. Reperfusion normalizes motor activation patterns in large‐vessel disease. Annals Of Neurology 2009, 65: 203-208. PMID: 19259970, PMCID: PMC2653600, DOI: 10.1002/ana.21554.Peer-Reviewed Original ResearchConceptsMotor activation patternsVasomotor reactivityActivation patternsInterest analysisIpsilateral motor activationLarge vessel diseaseNormal neurological functionHealthy control subjectsHigh-grade stenosisBlood oxygen level-dependent (BOLD) signalNormal blood flowDynamic functional reorganizationLevel-dependent signalFunctional magnetic resonanceRepeated-measures analysisHemodynamic failureHemodynamic impairmentRevascularization proceduresIpsilateral hemisphereNeurological functionControl subjectsClinical consequencesBlood flowFunctional reorganizationSpontaneous resolution
2006
Hemodynamic Impairment as a Stimulus for Functional Brain Reorganization
Marshall RS, Krakauer JW, Matejovsky T, Zarahn E, Barnes A, Lazar RM, Hirsch J. Hemodynamic Impairment as a Stimulus for Functional Brain Reorganization. Cerebrovascular And Brain Metabolism Reviews 2006, 26: 1256-1262. PMID: 16421509, DOI: 10.1038/sj.jcbfm.9600274.Peer-Reviewed Original ResearchConceptsVasomotor reactivityHemodynamic impairmentMotor-related activityControl subjectsFunctional reorganizationMotor regionsLevel-dependent signal intensityAbnormal cerebral hemodynamicsTypical motor activitiesLarge vessel occlusionSubgroup of patientsBlood oxygen level-dependent (BOLD) signal intensityContralateral motor areasFunctional brain reorganizationCarbon dioxide inhalationSimple motor taskFunctional magnetic resonanceAbnormal vasoreactivityTranscranial DopplerBrain reorganizationVessel occlusionCerebral hemodynamicsHand contralateralMotor areaFocal lesions
2004
Hypoperfusion without stroke alters motor activation in the opposite hemisphere
Krakauer JW, Radoeva PD, Zarahn E, Wydra J, Lazar RM, Hirsch J, Marshall RS. Hypoperfusion without stroke alters motor activation in the opposite hemisphere. Annals Of Neurology 2004, 56: 796-802. PMID: 15562431, DOI: 10.1002/ana.20286.Peer-Reviewed Original ResearchConceptsIpsilateral activationMiddle cerebral artery diseaseCerebral artery diseaseLarge vessel diseaseAge-matched controlsMotor-related areasNormal motor performanceFunctional magnetic resonanceHemodynamic compromiseVasomotor reactivityArtery diseaseHemispheric hypoperfusionCortical reorganizationInternal carotidHand contralateralPatientsMotor activationMotor tasksMotor performanceHypoperfusionHemispheric activationUnique activationDiseaseActivationMagnetic resonance