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Seminar✓ Recording AvailableNeuroscience

Optimization at the Single Neuron Level:​ Prediction of Spike Sequences and Emergence of Synaptic Plasticity Mechanisms

Matteo Saponati

Ernst-Strüngmann Institute for Neuroscience

Schedule
Wednesday, May 4, 2022

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Schedule

Wednesday, May 4, 2022

5:00 PM Europe/Berlin

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Host: SNUFA

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Event Information

Domain

Neuroscience

Original Event

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Host

SNUFA

Duration

30 minutes

Abstract

Intelligent behavior depends on the brain’s ability to anticipate future events. However, the learning rules that enable neurons to predict and fire ahead of sensory inputs remain largely unknown. We propose a plasticity rule based on pre-dictive processing, where the neuron learns a low-rank model of the synaptic input dynamics in its membrane potential. Neurons thereby amplify those synapses that maximally predict other synaptic inputs based on their temporal relations, which provide a solution to an optimization problem that can be implemented at the single-neuron level using only local information. Consequently, neurons learn sequences over long timescales and shift their spikes towards the first inputs in a sequence. We show that this mechanism can explain the development of anticipatory motion signaling and recall in the visual system. Furthermore, we demonstrate that the learning rule gives rise to several experimentally observed STDP (spike-timing-dependent plasticity) mechanisms. These findings suggest prediction as a guiding principle to orchestrate learning and synaptic plasticity in single neurons.

Topics

STDPanticipatory motionlocal informationneuron learningoptimizationplasticitypredictive processingspike sequencesspike-timing-dependent plasticityspiking neural networkssynaptic input dynamicssynaptic plasticity

About the Speaker

Matteo Saponati

Ernst-Strüngmann Institute for Neuroscience

Contact & Resources

@matteosaponati

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twitter.com/matteosaponati

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