1995
The anticonvulsant gabapentin enhances promoted release of GABA in hippocampus: a field potential analysis
Honmou O, Oyelese A, Kocsis J. The anticonvulsant gabapentin enhances promoted release of GABA in hippocampus: a field potential analysis. Brain Research 1995, 692: 273-277. PMID: 8548315, DOI: 10.1016/0006-8993(95)00634-3.Peer-Reviewed Original ResearchConceptsExcitatory postsynaptic potentialsFree GABA levelsField potential analysisNipecotic acidGABA levelsPopulation excitatory postsynaptic potentialEffects of microapplicationRelease of GABAGABAA receptor activationAdult rat brainMechanism of actionGABA releasePartial seizuresAnticonvulsant gabapentinPresynaptic volleyPostsynaptic potentialsBath applicationHippocampal slicesRat brainGBP treatmentHippocampal cellsBlock uptakeGabapentinReceptor activationGABA
1992
A model of NMDA receptor-mediated activity in dendrites of hippocampal CA1 pyramidal neurons
Pongracz F, Poolos N, Kocsis J, Shepherd G. A model of NMDA receptor-mediated activity in dendrites of hippocampal CA1 pyramidal neurons. Journal Of Neurophysiology 1992, 68: 2248-2259. PMID: 1337105, PMCID: PMC2605954, DOI: 10.1152/jn.1992.68.6.2248.Peer-Reviewed Original ResearchConceptsReceptor-mediated conductanceExcitatory postsynaptic potentialsPyramidal neuronsSynaptic responsesSynaptic activationSize of EPSPsExtracellular ion concentration changesNMDA receptor-mediated activityCA1 hippocampal pyramidal cellsCA1 hippocampal pyramidal neuronsHippocampal CA1 pyramidal neuronsDendritic NMDA receptorsRepetitive synaptic activationCA1 pyramidal neuronsInhibitory synaptic responsesFrequency-dependent depressionHippocampal pyramidal neuronsNMDA receptor activationHippocampal pyramidal cellsExtracellular potassium accumulationRepetitive activityIntrinsic membrane conductancesReceptor-mediated activityHz. 4Spike afterdepolarization
1990
Dendritic action potentials activated by NMDA receptor-mediated EPSPs in CA1 hippocampal pyramidal cells
Poolos N, Kocsis J. Dendritic action potentials activated by NMDA receptor-mediated EPSPs in CA1 hippocampal pyramidal cells. Brain Research 1990, 524: 342-346. PMID: 1981329, DOI: 10.1016/0006-8993(90)90714-m.Peer-Reviewed Original ResearchConceptsExcitatory postsynaptic potentialsCA1 hippocampal pyramidal cellsDendritic action potentialsHippocampal pyramidal cellsPyramidal cellsRat CA1 hippocampal pyramidal cellsNMDA receptor-mediated excitatory postsynaptic potentialsAction potentialsDendritic excitatory postsynaptic potentialsN-methyl-D-aspartate receptorsPyramidal cell bodiesShort-term potentiationIntradendritic recordingsPostsynaptic potentialsSynaptic responsesDendritic arborsDendritic conductancesRepetitive stimulationDendritic spikesSomatic recordingsCell bodiesSubthreshold responsesMultiple sitesCellsRecordingsElevated extracellular potassium concentration enhances synaptic activation of N-methyl-d-aspartate receptors in hippocampus
Poolos N, Kocsis J. Elevated extracellular potassium concentration enhances synaptic activation of N-methyl-d-aspartate receptors in hippocampus. Brain Research 1990, 508: 7-12. PMID: 2159824, DOI: 10.1016/0006-8993(90)91110-3.Peer-Reviewed Original ResearchConceptsNMDA receptor activationNMDA receptorsReceptor activationNMDA receptor-mediated componentN-methyl-D-aspartate receptorsElevated extracellular potassium concentrationReceptor-mediated componentReceptor-mediated conductanceChannel blocker tetraethylammoniumCentral nervous systemExtracellular potassium concentrationExtracellular potassium ion concentrationSlowed repolarizationOrthodromic stimulationPotassium equilibrium potentialCA1 regionPyramidal cellsRat hippocampusSynaptic activationBlocker tetraethylammoniumPostsynaptic activityRepetitive stimulationNeuronal activityNervous systemReceptors
1988
Buspirone, 8-OH-DPAT and ipsapirone: effects on hippocampal cerebellar and sciatic fiber excitability
Hiner B, Mauk M, Peroutka S, Kocsis J. Buspirone, 8-OH-DPAT and ipsapirone: effects on hippocampal cerebellar and sciatic fiber excitability. Brain Research 1988, 461: 1-9. PMID: 2906267, DOI: 10.1016/0006-8993(88)90719-6.Peer-Reviewed Original ResearchConceptsCerebellar parallel fibersSerotonergic mechanismsNerve excitabilityFiber excitabilityAction potentialsSucrose gap recordingsEffects of serotoninNovel anxiolytic buspironeCompound action potentialDose-dependent reductionSchaffer collateral fibersParallel fibersAfferent fibersSciatic nerveReversible decrementsCollateral fibersAnxiolytic buspironeConduction velocityDPATIpsapironeGap recordingsBuspironeCerebellar neuronsAxonal responseExcitabilityBuspirone attenuates synaptic activation of hippocampal pyramidal cells
Mauk, Peroutka S, Kocsis J. Buspirone attenuates synaptic activation of hippocampal pyramidal cells. Journal Of Neuroscience 1988, 8: 1-11. PMID: 3339401, PMCID: PMC6569355, DOI: 10.1523/jneurosci.08-01-00001.1988.Peer-Reviewed Original ResearchConceptsExcitatory postsynaptic potentialsPyramidal cellsStratum radiatumSynaptic activationAfferent fibersHippocampal CA1 pyramidal cellsInput resistanceStimulation of afferentsEffects of buspironeCA1 pyramidal cellsHippocampal pyramidal cellsPostsynaptic potentialsPresynaptic fibersConduction slowingFiber excitabilitySpike activityAnxiolytic agentsBuspironeRefractory periodRadiatumRapid hyperpolarizationReceptor sitesMeasurable effectExcitabilityMembrane potential
1987
Activity-evoked increases in extracellular potassium modulate presynaptic excitability in the CA1 region of the hippocampus
Poolos N, Mauk M, Kocsis J. Activity-evoked increases in extracellular potassium modulate presynaptic excitability in the CA1 region of the hippocampus. Journal Of Neurophysiology 1987, 58: 404-416. PMID: 3655875, DOI: 10.1152/jn.1987.58.2.404.Peer-Reviewed Original ResearchConceptsEnd of stimulationConduction velocityRepetitive stimulationCA1 afferentsStratum radiatumCA1 regionPostsynaptic elementsPostsynaptic activityBiphasic changeRat hippocampal slice preparationCompound action potentialHippocampal slice preparationCharacteristic field potentialHigher stimulation frequenciesPostsynaptic modulationPresynaptic volleyKynurenic acidPyramidal cellsSlice preparationPresynaptic axonsPresynaptic excitabilitySynaptic transmissionConduction blockIon-sensitive microelectrodesPostsynaptic activationModulation of neuronal activity in the hippocampus by 5-hydroxytryptamine and 5-hydroxytryptamine1a selective drugs
Peroutka S, Mauk M, Kocsis J. Modulation of neuronal activity in the hippocampus by 5-hydroxytryptamine and 5-hydroxytryptamine1a selective drugs. Neuropharmacology 1987, 26: 139-146. PMID: 2884586, DOI: 10.1016/0028-3908(87)90201-2.Peer-Reviewed Original ResearchConceptsTVX Q 7821Hippocampal slice preparationSlice preparationDose-dependent mannerMicromolar concentrationsApplication of drugsPopulation spikesRadioligand techniquesOH-DPATSchaffer collateralsHippocampal membranesNeuronal activityPyramidal layerKetanserinBaseline levelsBuspironeInitial increaseDPATSelective drugsDrugsField potentialsPhysiological effectsPopulationSimilar affinityBenzisothiazol-3