You are here: Home Bernstein Seminar 2012 Robert Gütig (Max-Planck Institute …

Banner Bernstein Seminar

Robert Gütig (Max-Planck Institute for Experimental Medicine, Göttingen, Germany) | Spike-timing based neuronal information processing: applications to vision and speech

When Jan 17, 2012
from 05:15 PM to 06:45 PM
Where Lecture Hall, Hansastr. 9a
Contact Name Ad Aertsen
Add event to calendar vCal
iCal

 

Abstract

The timing of action potentials of sensory neurons contains substantial information about the eliciting stimuli. Although computational advantages of spike-timing-based neuronal codes have long been recognized, it is unclear whether and how neurons can learn to read out such representations. We propose a novel biologically plausible supervised synaptic learning rule, the tempotron, enabling neurons to efficiently learn a broad range of decision rules, even when information is embedded in the spatio-temporal structure of spike patterns and not in mean firing rates. We demonstrate the enhanced performance of the tempotron over the rate-based perceptron in reading out spike patterns from retinal ganglion cell populations.

Extending the tempotron to conductance-based voltage kinetics, we show that this model can subserve time-warp invariant processing of afferent spike patterns. Furthermore, we show that the conductance-based tempotron can learn to balance excitation and inhibition to match its integration time constant to the temporal scale of a given processing task. These mechanisms enable already small populations of model neurons to match the performance of state-of-the-art speech recognition systems on isolated word recognition tasks.

 

All upcoming scientific events

Back to overview

All Bernstein Seminars

2024 |  202320222021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010

Filed under: