2023
Cross-hemicord spinal fiber reorganization associates with cortical sensory and motor network expansion in the rat model of hemicontusion cervical spinal cord injury
Mihailovic J, Sanganahalli B, Hyder F, Chitturi J, Elkabes S, Heary R, Kannurpatti S. Cross-hemicord spinal fiber reorganization associates with cortical sensory and motor network expansion in the rat model of hemicontusion cervical spinal cord injury. Neuroscience Letters 2023, 820: 137607. PMID: 38141752, PMCID: PMC10797561, DOI: 10.1016/j.neulet.2023.137607.Peer-Reviewed Original ResearchConceptsSpinal cord injuryCervical spinal cord injuryDiffusion tensor imagingCord injurySpinal cordCervical spinal cordState functional connectivitySpinal cord samplesSpinal cord diffusion tensor imagingMagnetic resonance imagingBrain functional MRIInjury epicenterSpinal reorganizationPost-SCINeuroplastic changesCord samplesCortical sensoryRat modelTraumatic injuryMD changeMotor networkNervous systemResonance imagingSingle-subject levelFunctional MRI
2022
EEG–fMRI in Animal Models
Gummadavelli A, Sanganahalli B, Herman P, Hyder F, Blumenfeld H. EEG–fMRI in Animal Models. 2022, 663-694. DOI: 10.1007/978-3-031-07121-8_27.Peer-Reviewed Original ResearchFunctional magnetic resonance imagingSimultaneous EEG-fMRI studyEEG-fMRI studiesAnimal modelsMetabolic changesModality of choiceMagnetic resonance imagingEEG-fMRIDeep brain structuresInvasive studiesNeuronal activityHuman studiesSensory-motor processingNeuronal functionResonance imagingNeuronal processesBrain structuresSimultaneous EEG-fMRIImproved treatmentNeuroimaging signalsSoft tissueElectrical activityNeuronal networksExcellent temporal resolutionFMRI signals
2021
Supraspinal Sensorimotor and Pain-Related Reorganization after a Hemicontusion Rat Cervical Spinal Cord Injury
Sanganahalli BG, Chitturi J, Herman P, Elkabes S, Heary R, Hyder F, Kannurpatti SS. Supraspinal Sensorimotor and Pain-Related Reorganization after a Hemicontusion Rat Cervical Spinal Cord Injury. Journal Of Neurotrauma 2021, 38: 3393-3405. PMID: 34714150, PMCID: PMC8713267, DOI: 10.1089/neu.2021.0190.Peer-Reviewed Original ResearchConceptsSpinal cord injuryCervical spinal cord injuryAnterior cingulate cortexFunctional magnetic resonance imagingPre-frontal cortexNociceptive regionsCord injuryPresence of painSecondary somatosensory cortexFunctional connectivity densityElectrical forepaw stimulationFemale adult ratsTranslational animal modelsMost cortical regionsMagnetic resonance imagingDiscernable lesionsIpsilesional forelimbKdyn forceRSFC decreasesRsFC increasesSupraspinal changesMotor recoveryThermal hyperalgesiaT2 lesionsPain behavior
2020
Association Between Magnetic Resonance Imaging-Based Spinal Morphometry and Sensorimotor Behavior in a Hemicontusion Model of Incomplete Cervical Spinal Cord Injury in Rats
Chitturi J, Sanganahalli BG, Herman P, Hyder F, Ni L, Elkabes S, Heary R, Kannurpatti SS. Association Between Magnetic Resonance Imaging-Based Spinal Morphometry and Sensorimotor Behavior in a Hemicontusion Model of Incomplete Cervical Spinal Cord Injury in Rats. Brain Connectivity 2020, 10: 479-489. PMID: 32981350, PMCID: PMC7698856, DOI: 10.1089/brain.2020.0812.Peer-Reviewed Original ResearchConceptsNeurological outcomeFunctional connectivity changesSpinal cordMagnetic resonance imagingComplete neural axisNeural axisCervical SCIMorphometric changesIncomplete cervical spinal cord injuryC4/C5 levelResonance imagingCervical spinal cord injurySpinal cord injury patientsFunctional connectivityConnectivity changesCord injury patientsT2-weighted lesionsCervical spinal cordSpinal cord injuryYoung adult ratsFunctional connectivity assessmentC5 levelSCI ratsInjury patientsSham ratsKaempferol Treatment after Traumatic Brain Injury during Early Development Mitigates Brain Parenchymal Microstructure and Neural Functional Connectivity Deterioration at Adolescence
Parent M, Chitturi J, Santhakumar V, Hyder F, Sanganahalli BG, Kannurpatti SS. Kaempferol Treatment after Traumatic Brain Injury during Early Development Mitigates Brain Parenchymal Microstructure and Neural Functional Connectivity Deterioration at Adolescence. Journal Of Neurotrauma 2020, 37: 966-974. PMID: 31830867, PMCID: PMC7175625, DOI: 10.1089/neu.2019.6486.Peer-Reviewed Original ResearchConceptsTraumatic brain injuryKaempferol treatmentDiffusion tensor imagingFractional anisotropyBrain injuryParenchymal microstructureCallosal fractional anisotropyInterhemispheric structural connectivityH post-TBINeural connectivitySelect brain regionsFunctional magnetic resonance imagingMagnetic resonance imagingTBI prognosisCerebrovascular reactivityFunctional outcomeImaging outcomesNeurovascular couplingPost-TBITBI outcomesTBI pathophysiologyMetabolic benefitsResting-state functional connectivity networksRsFC changesWhole brain
2016
Metabolic demands of neural-hemodynamic associated and disassociated areas in brain
Sanganahalli BG, Herman P, Rothman DL, Blumenfeld H, Hyder F. Metabolic demands of neural-hemodynamic associated and disassociated areas in brain. Cerebrovascular And Brain Metabolism Reviews 2016, 36: 1695-1707. PMID: 27562867, PMCID: PMC5076793, DOI: 10.1177/0271678x16664531.Peer-Reviewed Original ResearchConceptsVentral posterolateral thalamic nucleusFunctional magnetic resonance imagingMulti-unit activityLocal field potentialsMetabolic demandsPosterolateral thalamic nucleusBlood oxygenation level-dependent (BOLD) responseSensory-evoked responsesCortical local field potentialsThalamic local field potentialsMagnetic resonance imagingLevel-dependent responsesSimilar metabolic demandThalamic nucleiForelimb cortexBlood flowBlood volumeCBV responseResonance imagingLatency differenceHemodynamicsBOLD signalOxidative metabolismDifferent metabolic demandsField potentials
2015
Comparison of glomerular activity patterns by fMRI and wide-field calcium imaging: Implications for principles underlying odor mapping
Sanganahalli BG, Rebello MR, Herman P, Papademetris X, Shepherd GM, Verhagen JV, Hyder F. Comparison of glomerular activity patterns by fMRI and wide-field calcium imaging: Implications for principles underlying odor mapping. NeuroImage 2015, 126: 208-218. PMID: 26631819, PMCID: PMC4733588, DOI: 10.1016/j.neuroimage.2015.11.048.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingHigh-resolution functional magnetic resonance imagingPost-synaptic activityPre-synaptic inputOlfactory bulb glomeruliFunctional imaging signalsWide-field calcium imagingMagnetic resonance imagingHemodynamic eventsAnesthetized ratsGlomerular layerNeuronal circuitryGlomerular clustersGlomerular patternNeuropil regionsCalcium imagingDye imagingResonance imagingActivity patternsDeoxyhemoglobin contrastGlomerular activity patternsGlomerular sheetGlomerular networkGlomeruli
2014
Decreased Resting Functional Connectivity after Traumatic Brain Injury in the Rat
Mishra AM, Bai X, Sanganahalli BG, Waxman SG, Shatillo O, Grohn O, Hyder F, Pitkänen A, Blumenfeld H. Decreased Resting Functional Connectivity after Traumatic Brain Injury in the Rat. PLOS ONE 2014, 9: e95280. PMID: 24748279, PMCID: PMC3991600, DOI: 10.1371/journal.pone.0095280.Peer-Reviewed Original ResearchConceptsTraumatic brain injuryContralateral parietal cortexSham-operated animalsFunctional magnetic resonance imagingParietal cortexFunctional connectivityFunctional imagingBrain injuryAdult male Sprague-Dawley ratsLateral fluid percussion injuryExperimental traumatic brain injuryMale Sprague-Dawley ratsFluid percussion injuryPost-traumatic epileptogenesisSeizure-susceptibility testState BOLD-fMRISide of injuryAbnormal functional connectivitySham-operated ratsSprague-Dawley ratsMagnetic resonance imagingSeizure susceptibilitySkull electrodesEpileptiform dischargesFunctional imaging data
2013
Increased resting functional connectivity in spike‐wave epilepsy in WAG/Rij rats
Mishra AM, Bai X, Motelow JE, DeSalvo MN, Danielson N, Sanganahalli BG, Hyder F, Blumenfeld H. Increased resting functional connectivity in spike‐wave epilepsy in WAG/Rij rats. Epilepsia 2013, 54: 1214-1222. PMID: 23815571, PMCID: PMC3703864, DOI: 10.1111/epi.12227.Peer-Reviewed Original ResearchConceptsSpike-wave dischargesWAG/RijFunctional connectivityNonepileptic controlsAbsence epilepsyEpileptic WAG/RijBrain networksWAG/Rij ratsChronic seizure activitySpike-wave epilepsyHuman absence seizuresChildhood absence epilepsyWistar Albino GlaxoActivity-dependent plasticityCortical-cortical connectivityFunctional magnetic resonance imagingMagnetic resonance imagingNonepileptic animalsSeizure activitySpontaneous episodesWistar controlsAbsence seizuresAdjacent cortexChronic changesAnimal modelsFunctional 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 stimulation
2012
Analysis of Time and Space Invariance of BOLD Responses in the Rat Visual System
Bailey CJ, Sanganahalli BG, Herman P, Blumenfeld H, Gjedde A, Hyder F. Analysis of Time and Space Invariance of BOLD Responses in the Rat Visual System. Cerebral Cortex 2012, 23: 210-222. PMID: 22298731, PMCID: PMC3513959, DOI: 10.1093/cercor/bhs008.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingGeneral linear modelingSuperior colliculusBOLD responseBasal blood flowNeural activityRat visual systemBlood oxygenation level-dependent (BOLD) responsePrimary visual cortexMagnetic resonance imagingLevel-dependent responsesNeurovascular couplingRat brainBlood flowVisual cortexResonance imagingStimulation paradigmV1 signalsLight flashesOnset/Neural signalsResponseV1Visual systemColliculus
2011
Role of Ongoing, Intrinsic Activity of Neuronal Populations for Quantitative Neuroimaging of Functional Magnetic Resonance Imaging–Based Networks
Hyder F, Herman P, Sanganahalli BG, Coman D, Blumenfeld H, Rothman DL. Role of Ongoing, Intrinsic Activity of Neuronal Populations for Quantitative Neuroimaging of Functional Magnetic Resonance Imaging–Based Networks. Brain Connectivity 2011, 1: 185-193. PMID: 22433047, PMCID: PMC3621320, DOI: 10.1089/brain.2011.0032.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingEnergy/activityMagnetic resonance imagingBOLD signalNeuronal activityQuantitative neuroimagingNeuronal populationsResonance imagingBaseline BOLD signalsTotal neuronal activityBlood oxygenation level-dependent (BOLD) signalLevel-dependent signalResting-state fMRI experimentsAnimal modelsFMRI experimentMagnetic resonance spectroscopy measurementsBrain networksBaselineNeuroimagingPrimary objectiveImagingIntrinsic activityActivityPopulation
2010
Neurovascular and Neurometabolic Couplings in Dynamic Calibrated fMRI: Transient Oxidative Neuroenergetics for Block-Design and Event-Related Paradigms
Hyder F, Sanganahalli BG, Herman P, Coman D, Maandag NJ, Behar KL, Blumenfeld H, Rothman DL. Neurovascular and Neurometabolic Couplings in Dynamic Calibrated fMRI: Transient Oxidative Neuroenergetics for Block-Design and Event-Related Paradigms. Frontiers In Neuroenergetics 2010, 2: 18. PMID: 20838476, PMCID: PMC2936934, DOI: 10.3389/fnene.2010.00018.Peer-Reviewed Original ResearchFunctional magnetic resonance imagingCerebral blood flowMulti-unit activityLocal field potentialsNeurometabolic couplingQuantitative functional magnetic resonance imagingBOLD signalCerebral metabolic rateNeural activityBlood oxygenation level-dependent (BOLD) contrastMagnetic resonance imagingMapping brain activityLevel-dependent contrastBlood flowMUA recordingsNeurophysiological parametersAnimal studiesResonance imagingBrain functionTissue poolsEvent-related paradigmField potentialsBrain activityNeural activity recordingActivity recordings
2009
Tactile and Non-tactile Sensory Paradigms for fMRI and Neurophysiologic Studies in Rodents
Sanganahalli BG, Bailey CJ, Herman P, Hyder F. Tactile and Non-tactile Sensory Paradigms for fMRI and Neurophysiologic Studies in Rodents. Methods In Molecular Biology 2009, 489: 213-242. PMID: 18839094, PMCID: PMC3703391, DOI: 10.1007/978-1-59745-543-5_10.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingBlood oxygenation level-dependent (BOLD) signal changesDifferent peripheral stimuliSensory paradigmsLevel-dependent signal changesFunctional imaging toolMagnetic resonance imagingBOLD signal changesDependent signal changesCortical perceptionSignal changesNeurophysiologic studiesAnesthetized ratsNeuronal activityStimulation protocolPeripheral stimuliPharmacological agentsHuman studiesAnimal modelsFuture diagnostic useVariety of modalitiesResonance imagingInvasive natureNeurophysiologic markersSensory systems
2008
Multimodal Measurements of Blood Plasma and Red Blood Cell Volumes during Functional Brain Activation
Herman P, Sanganahalli BG, Hyder F. Multimodal Measurements of Blood Plasma and Red Blood Cell Volumes during Functional Brain Activation. Cerebrovascular And Brain Metabolism Reviews 2008, 29: 19-24. PMID: 18766196, PMCID: PMC2714270, DOI: 10.1038/jcbfm.2008.100.Peer-Reviewed Original ResearchConceptsLaser Doppler flowmetryFunctional magnetic resonance imagingMagnetic resonance imagingMagnetic field inhomogeneityLaser lightField inhomogeneityResonance imagingContralateral primary somatosensory cortexRed blood cell volumePrimary somatosensory cortexCerebral blood volumeBlood oxygenation level-dependent (BOLD) contrastBlood cell volumeFunctional brain activationLevel-dependent contrastUltra-small superparamagnetic iron oxideBlood plasmaContrast agentsIntravascular contrast agentCBV signalsTotal CBVPlasmaRed blood cellsDependent contrastDynamic measurements
2007
Negative BOLD with Large Increases in Neuronal Activity
Schridde U, Khubchandani M, Motelow JE, Sanganahalli BG, Hyder F, Blumenfeld H. Negative BOLD with Large Increases in Neuronal Activity. Cerebral Cortex 2007, 18: 1814-1827. PMID: 18063563, PMCID: PMC2790390, DOI: 10.1093/cercor/bhm208.Peer-Reviewed Original ResearchConceptsCerebral blood flowCerebral blood volumeFunctional magnetic resonance imagingNegative BOLD signalsNeuronal activityBOLD signalLevel-dependent functional magnetic resonance imagingBlood oxygen level-dependent functional magnetic resonance imagingBOLD functional magnetic resonance imagingCerebral metabolic ratePositive BOLD signalMagnetic resonance imagingBlood flowNegative BOLDBlood volumeResonance imagingBrain regionsPathological conditionsNeuronal recordingsBrain activityFMRI signalsOxygen consumptionMetabolic rateMetabolic activitySeizures