2015
Electrical behaviour of dendritic spines as revealed by voltage imaging
Popovic MA, Carnevale N, Rozsa B, Zecevic D. Electrical behaviour of dendritic spines as revealed by voltage imaging. Nature Communications 2015, 6: 8436. PMID: 26436431, PMCID: PMC4594633, DOI: 10.1038/ncomms9436.Peer-Reviewed Original ResearchImaging Submillisecond Membrane Potential Changes from Individual Regions of Single Axons, Dendrites and Spines
Popovic M, Vogt K, Holthoff K, Konnerth A, Salzberg BM, Grinvald A, Antic SD, Canepari M, Zecevic D. Imaging Submillisecond Membrane Potential Changes from Individual Regions of Single Axons, Dendrites and Spines. Advances In Experimental Medicine And Biology 2015, 859: 57-101. PMID: 26238049, PMCID: PMC5671121, DOI: 10.1007/978-3-319-17641-3_3.Peer-Reviewed Original ResearchConceptsIndividual neuronsMembrane potential changesVoltage-sensitive dye recordingAction potential initiationIndividual dendritic spinesSite of originAxon collateralsIndividual nerve cellsMembrane potential transientsVoltage-sensitive dyeDendritic spinesRegional electrical propertiesDendritic treeNerve cellsNeuronal processesSingle axonsPotential initiationComplex operational unitsBehavioral modificationNeuronal network analysisNeuronsInput-output functionMultisite recordingsCombining Membrane Potential Imaging with Other Optical Techniques
Jaafari N, Vogt KE, Saggau P, Leslie LM, Zecevic D, Canepari M. Combining Membrane Potential Imaging with Other Optical Techniques. Advances In Experimental Medicine And Biology 2015, 859: 103-125. PMID: 26238050, PMCID: PMC5675139, DOI: 10.1007/978-3-319-17641-3_4.Peer-Reviewed Original ResearchConceptsMembrane potential imagingOptical techniquesPotential imagingUncaging techniquesChannelrhodopsin stimulationVoltage-sensitive dyeVariety of applicationsSpatial mappingElectrical signalsImportant applicationsVoltageFluorescence intensityImagingParticular moleculeSignalsMembrane potential changesGateNovel investigationOptogeneticsMeasurementsIntensityTechniqueCurrent
2012
Voltage-sensitive dye recording from axons, dendrites and dendritic spines of individual neurons in brain slices.
Popovic M, Gao X, Zecevic D. Voltage-sensitive dye recording from axons, dendrites and dendritic spines of individual neurons in brain slices. Journal Of Visualized Experiments 2012, e4261. PMID: 23222505, PMCID: PMC3565854, DOI: 10.3791/4261.Peer-Reviewed Original ResearchConceptsLaser light sourceSub-micrometer resolutionLight sourceOptical recordingDetectable pharmacological effectsCurrent sensitivityVoltage-sensitive dyeSubthreshold eventsElectrical propertiesDetailed measurementsMultiple-site optical recordingVoltage-sensitive dye recordingFluorescence signalOptimal wavelengthsMembrane potential transientsElectrical signalsIndividual dendritic spinesExperimental evidenceWavelengthMeasurement oneMeasurementsBroadeningDye loadingPotential transientsBrightnessCortical Dendritic Spine Heads Are Not Electrically Isolated by the Spine Neck from Membrane Potential Signals in Parent Dendrites
Popovic MA, Gao X, Carnevale NT, Zecevic D. Cortical Dendritic Spine Heads Are Not Electrically Isolated by the Spine Neck from Membrane Potential Signals in Parent Dendrites. Cerebral Cortex 2012, 24: 385-395. PMID: 23054810, PMCID: PMC3888368, DOI: 10.1093/cercor/bhs320.Peer-Reviewed Original Research
2011
Somatic Membrane Potential and Kv1 Channels Control Spike Repolarization in Cortical Axon Collaterals and Presynaptic Boutons
Foust AJ, Yu Y, Popovic M, Zecevic D, McCormick DA. Somatic Membrane Potential and Kv1 Channels Control Spike Repolarization in Cortical Axon Collaterals and Presynaptic Boutons. Journal Of Neuroscience 2011, 31: 15490-15498. PMID: 22031895, PMCID: PMC3225031, DOI: 10.1523/jneurosci.2752-11.2011.Peer-Reviewed Original ResearchMeSH Keywords4-AminopyridineAnimalsAxonsBiophysical PhenomenaComputer SimulationCrystallinsDose-Response Relationship, DrugElapid VenomsElectric StimulationFemaleGreen Fluorescent ProteinsIn Vitro TechniquesMaleMembrane PotentialsMiceMice, TransgenicModels, NeurologicalMu-CrystallinsNerve NetNeuronsPatch-Clamp TechniquesPotassium Channel BlockersPresynaptic TerminalsShaker Superfamily of Potassium ChannelsSomatosensory CortexStyrenesTetraethylammoniumConceptsAxon collateralsPresynaptic boutonsKv1 channelsSpike repolarizationPresynaptic terminalsSubthreshold depolarizationAction potentialsΑ-dendrotoxinLayer 5 pyramidal cellsIntracortical axon collateralsSynaptic neurotransmitter releaseMouse brain slicesSomatic membrane potentialKv1 subunitsPyramidal cellsSynaptic transmissionBrain slicesVoltage-sensitive dyeLow dosesNeurotransmitter releaseSynaptic strengthBoutonsCollateralsRepolarizationIon channels
2010
Action Potentials Initiate in the Axon Initial Segment and Propagate through Axon Collaterals Reliably in Cerebellar Purkinje Neurons
Foust A, Popovic M, Zecevic D, McCormick DA. Action Potentials Initiate in the Axon Initial Segment and Propagate through Axon Collaterals Reliably in Cerebellar Purkinje Neurons. Journal Of Neuroscience 2010, 30: 6891-6902. PMID: 20484631, PMCID: PMC2990270, DOI: 10.1523/jneurosci.0552-10.2010.Peer-Reviewed Original ResearchConceptsAxon initial segmentAxon collateralsAction potentialsPurkinje neuronsComplex spikesLocal axon collateralsCerebellar Purkinje neuronsInitial segmentFast action potentialsAxon branch pointsSynaptic inputsVoltage-sensitive dyeCerebellar cortexNeuronal processingSpike initiationDischarge frequencySingle trialCollateralsOutput cellsNeuronsImaging Inhibitory Synaptic Potentials Using Voltage Sensitive Dyes
Canepari M, Willadt S, Zecevic D, Vogt KE. Imaging Inhibitory Synaptic Potentials Using Voltage Sensitive Dyes. Biophysical Journal 2010, 98: 2032-2040. PMID: 20441768, PMCID: PMC2862202, DOI: 10.1016/j.bpj.2010.01.024.Peer-Reviewed Original ResearchConceptsInhibitory postsynaptic potentialsVoltage-sensitive dyeGABAergic inhibitory postsynaptic potentialsCA1 hippocampal pyramidal neuronsPatch electrodeInhibitory synaptic potentialsInhibitory synaptic transmissionHippocampal pyramidal neuronsIntracellular chloride concentrationWhole-cell configurationPyramidal neuronsApical dendritesPostsynaptic potentialsSynaptic potentialsSynaptic transmissionBrain slicesElectrode recordingsNeuronsSensitive dyeVoltage imaging techniqueDendritesMultiple sitesVoltage imagingAxonsRapid time course of action potentials in spines and remote dendrites of mouse visual cortex neurons
Holthoff K, Zecevic D, Konnerth A. Rapid time course of action potentials in spines and remote dendrites of mouse visual cortex neurons. The Journal Of Physiology 2010, 588: 1085-1096. PMID: 20156851, PMCID: PMC2852997, DOI: 10.1113/jphysiol.2009.184960.Peer-Reviewed Original ResearchConceptsRapid time courseAction potentialsDendritic spinesIndividual dendritic spinesLayer 5 pyramidal neuronsTime courseTiming-dependent synaptic plasticityDendritic branchesCentral mammalian neuronsTerminal dendritic branchesVisual cortex neuronsTerminal branchesSomatic action potentialsIndividual spinesRemote dendritesPyramidal neuronsApical dendritesCortex neuronsExcitatory synapsesSupralinear integrationSynaptic inputsVoltage-sensitive dyeJuvenile miceSynaptic plasticityVisual cortex