2023
Spatiotemporal features of neurovascular (un)coupling with stimulus-induced activity and hypercapnia challenge in cerebral cortex and olfactory bulb
James S, Sanggaard S, Akif A, Mishra S, Sanganahalli B, Blumenfeld H, Verhagen J, Hyder F, Herman P. Spatiotemporal features of neurovascular (un)coupling with stimulus-induced activity and hypercapnia challenge in cerebral cortex and olfactory bulb. Cerebrovascular And Brain Metabolism Reviews 2023, 43: 1891-1904. PMID: 37340791, PMCID: PMC10676132, DOI: 10.1177/0271678x231183887.Peer-Reviewed Original ResearchConceptsVasodilatory responseCerebral cortexNeurovascular couplingOlfactory bulbNeuronal activityBrief sensory stimuliRegional neurovascular couplingStimulus-induced activityHypercapnia challengeVascular toneNeuronal deactivationHemodynamic responseNeuronal excitabilityNeuronal responsesCalcium transientsBrain functionHemodynamic signalsSensory stimuliVasodilationHypercapniaCortexMiceCareful appraisalStimuliMetabolic waste
2013
Quantitative basis for neuroimaging of cortical laminae with calibrated functional MRI
Herman P, Sanganahalli BG, Blumenfeld H, Rothman DL, Hyder F. Quantitative basis for neuroimaging of cortical laminae with calibrated functional MRI. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 15115-15120. PMID: 23980158, PMCID: PMC3773779, DOI: 10.1073/pnas.1307154110.Peer-Reviewed Original ResearchConceptsCerebral blood volumeLocal field potentialsMultiunit activitySomatosensory cortexCortical laminaeBlood oxygenation level-dependent (BOLD) signalRat somatosensory cortexLevel-dependent signalNeurometabolic couplingCerebral cortexSuperficial laminaeCBF changesDeep laminaeMagnetic resonance imaging dataBlood flowQuantitative neuroimagingBlood volumeFunctional MRISensory stimulationBOLD signalOxidative metabolismCortexLayer-specific responsesMetabolic measurementsField potentialsFunctional MRI and neural responses in a rat model of Alzheimer's disease
Sanganahalli BG, Herman P, Behar KL, Blumenfeld H, Rothman DL, Hyder F. Functional MRI and neural responses in a rat model of Alzheimer's disease. NeuroImage 2013, 79: 404-411. PMID: 23648961, PMCID: PMC3700380, DOI: 10.1016/j.neuroimage.2013.04.099.Peer-Reviewed Original ResearchConceptsAlzheimer's diseaseFunctional magnetic resonance imagingCerebral cortexAD brainSomatosensory cortexRat modelCortical functionNeural responsesAge-matched healthy controlsAD rat modelContralateral somatosensory cortexSensory-evoked responsesHigh-field functional magnetic resonance imagingBrain functional responsesMagnetic resonance imagingAD ratsControl ratsHealthy controlsThalamic responsesNormal ratsCortical responsesAD modelSubcortical functionBrain plaquesElectrical stimulationCortical energy demands of signaling and nonsignaling components in brain are conserved across mammalian species and activity levels
Hyder F, Rothman DL, Bennett MR. Cortical energy demands of signaling and nonsignaling components in brain are conserved across mammalian species and activity levels. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 3549-3554. PMID: 23319606, PMCID: PMC3587194, DOI: 10.1073/pnas.1214912110.Peer-Reviewed Original ResearchConceptsGlucose oxidation ratesCerebral cortexNeuronal activityActivity levelsGlucose metabolic dataHuman cerebral cortexMetabolic dataOxidative demandAwake valuesCortical neuronsSynaptic transmissionGlucose metabolismAwake stateSensory stimulationAnatomic dataRatsCortexMammalian speciesIsoelectricityMagnetic resonance spectroscopy resultsSignaling requirementsAstrocytesCell membraneLevelsNeurons
2011
Where fMRI and Electrophysiology Agree to Disagree: Corticothalamic and Striatal Activity Patterns in the WAG/Rij Rat
Mishra AM, Ellens DJ, Schridde U, Motelow JE, Purcaro MJ, DeSalvo MN, Enev M, Sanganahalli BG, Hyder F, Blumenfeld H. Where fMRI and Electrophysiology Agree to Disagree: Corticothalamic and Striatal Activity Patterns in the WAG/Rij Rat. Journal Of Neuroscience 2011, 31: 15053-15064. PMID: 22016539, PMCID: PMC3432284, DOI: 10.1523/jneurosci.0101-11.2011.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBrainBrain MappingBrain WavesCerebral CortexCerebrovascular CirculationCorpus StriatumDisease Models, AnimalElectroencephalographyElectrophysiologyEpilepsyImage Processing, Computer-AssistedLaser-Doppler FlowmetryMagnetic Resonance ImagingNicotinic AntagonistsOxygenRatsRats, WistarThalamusTubocurarineVibrissaeConceptsCerebral blood flowCerebral blood volumeLocal field potentialsNeuronal activityLaser Doppler cerebral blood flowSubcortical structuresWAG/Rij ratsNeuronal activity decreasesHuman absence epilepsySpike-wave dischargesWAG/RijMultiunit activity recordingsFMRI signalsFunctional magnetic resonance imaging (fMRI) signalsMagnetic resonance imaging signalsFMRI decreasesCBF decreaseHemodynamic changesCerebral cortexBasal gangliaSomatosensory cortexAbsence epilepsyWhisker stimulationBlood flowAnimal models
2002
Quantitative fMRI of rat brain by multi-modal MRI and MRS measurements
Hyder F, Kida I, Smith A, Blumenfeld H, Shulman R, Rothman D. Quantitative fMRI of rat brain by multi-modal MRI and MRS measurements. International Congress Series 2002, 1235: 57-71. DOI: 10.1016/s0531-5131(02)00173-5.Peer-Reviewed Original ResearchMagnetic resonance imagingRat brainNeuronal activityFunctional MRIBOLD fMRI signalCerebral cortexNeuronal glucose oxidationRat cerebral cortexFunctional magnetic resonance imagingFMRI signalsBOLD functional MRIQuantitative magnetic resonance imagingBlood oxygenation levelBOLD fMRI studiesMulti-modal magnetic resonance imagingQuantitative functional MRIGlutamatergic neuronsOxygen deliveryPhysiologic basisResonance imagingPhysiologic componentsCMRO2BrainBlood circulationOxygenation level
2001
Quantitative functional imaging of the brain: towards mapping neuronal activity by BOLD fMRI
Hyder F, Kida I, Behar K, Kennan R, Maciejewski P, Rothman D. Quantitative functional imaging of the brain: towards mapping neuronal activity by BOLD fMRI. NMR In Biomedicine 2001, 14: 413-431. PMID: 11746934, DOI: 10.1002/nbm.733.Peer-Reviewed Original ResearchConceptsMagnetic resonance imagingNeuronal activityBOLD functional MRIFunctional MRICerebral cortexPharmacological treatmentGlutamate release inhibitorNeuronal glucose oxidationRat cerebral cortexRelease of glutamateRat forepaw stimulation modelFMRI signalsFunctional magnetic resonance imagingQuantitative magnetic resonance imagingBlood oxygenation levelBOLD fMRI studiesEnergy metabolismBOLD fMRI signalMulti-modal magnetic resonance imagingGlutamatergic neuronsRelease inhibitorChannel blockersRat brainOxygen deliveryNeurochemical basis