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Neural Coding in Leech Nervous System and Vertebrate Retina Using Computational Neuroscience

Explore neural coding mechanisms in leech nervous system and vertebrate retina through computational neuroscience. Investigate cellular properties, network interactions, and reliability of responses. Projects include retinal ensemble coding, latency-based coding, and simulations based on physiological data.

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Neural Coding in Leech Nervous System and Vertebrate Retina Using Computational Neuroscience

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  1. Research Plans Computational Neuroscience • Jutta Kretzberg • University of Antwerp • 7.6.2007 • http://www.uni-oldenburg.de/sinnesphysiologie/en/

  2. time Central question: Neural coding • Important response features • Individual cells • Cell ensembles • Origin of neuronal responses • Cellular properties • Network interactions • Reliability of responses

  3. Leech nervous system Currently used systems Vertebrate retina

  4. Retinal coding - current projects • Latency-based retinal coding of visual stimuli during eye movements • Retinal ensemble coding under dynamic conditions • Mechanisms of retinal coding for global image movement Multi-electrode recordings and data analysis (Bayesian reconstruction, metric-based clustering, information-theoretic methods)

  5. Horizontal cell physiology Kolb 1974 Retinal coding - future projects Retinal network interactions Simulations based on physiological data (networks of simplified models, multi-compartment models)

  6. Experiment Simulation Leech CNS - current project Influence of ion channel distribution on spike activity 200 Electrophysiology and Simulations (intracellular recordings, multi-compartment models)

  7. Leech CNS - future projects Local bend network • Encoding of touch stimuli • Interaction of inputs to interneurons • Sources of variability • Network interactions between sensor cells • Role of electrical connections in the network Electrophysiology and Simulations (intracellular recordings, multi-compartment & network models)

  8. Common interests with TNB group

  9. New impulses • Sensory coding • Well-defined input and output • Direct link to behavior • Analysis of retinal network • Multi-electrode recordings • Several data analysis methods • Analysis of leech network • Easily approachable microcircuit • Close sensory-motor interaction Similar questions and methods: Comparison of different systems

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