0000000000653540

AUTHOR

Jonas Dyhrfjeld-johnsen

0000-0003-0875-909x

showing 2 related works from this author

Optical release of caged glutamate for stimulation of neurons in the in vitro slice preparation

2005

Optical stimulation techniques prove useful to map func- tional inputs in the in vitro brain slice preparation: Glutamate released by a focused beam of UV light induces action potentials, which can be detected in postsynaptic neurons. The direct activation effect is influenced by factors such as compound concentration, focus depth, light absorption in the tissue, and sensitivity of different neuronal do- mains. We analyze information derived from direct stimulation ex- periments in slices from rat barrel cortex and construct a computa- tional model of a layer V pyramidal neuron that reproduces the experimental findings. The model predictions concerning the influ- ence of focus depth on inpu…

MalePatch-Clamp TechniquesUltraviolet RaysModels NeurologicalBiomedical EngineeringAction PotentialsStimulationIn Vitro TechniquesCaged glutamateBrain mappingBiomaterialsOpticsSlice preparationGlutamatesPostsynaptic potentialmedicineAnimalsComputer SimulationRats WistarMicroscopy VideoPhotolysisbusiness.industryChemistryPyramidal CellsGlutamate receptorEquipment DesignSomatosensory CortexBarrel cortexAtomic and Molecular Physics and OpticsRatsElectronic Optical and Magnetic Materialsmedicine.anatomical_structureLens (anatomy)SynapsesBiophysicsbusinessJournal of Biomedical Optics
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CoCoDat: a database system for organizing and selecting quantitative data on single neurons and neuronal microcircuitry.

2004

We present a novel database system for organizing and selecting quantitative experimental data on single neurons and neuronal microcircuitry that has proven useful for reference-keeping, experimental planning and computational modelling. Building on our previous experience with large neuroscientific databases, the system takes into account the diversity and method-dependence of single cell and microcircuitry data and provides tools for entering and retrieving published data without a priori interpretation or summarizing. Data representation is based on the framework suggested by biophysical theory and enables flexible combinations of data on membrane conductances, ionic and synaptic current…

Computer sciencecomputer.internet_protocolRelational databaseModels NeurologicalAction PotentialsInformation Storage and Retrievalcomputer.software_genreMachine learningExternal Data RepresentationData retrievalAnimalsComputer SimulationLayer (object-oriented design)NeuronsDatabasebusiness.industryGeneral NeuroscienceExperimental dataRatsData sharingScalabilityDatabase Management SystemsArtificial intelligenceNeural Networks ComputerNerve NetbusinesscomputerXMLJournal of neuroscience methods
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