BMC Neuroscience

, 8:P200 | Cite as

Learning in spatially extended dendrites

  • Carl-Magnus Svensson
  • Stephen Coombes
  • Yulia Timofeeva
Open Access
Poster presentation
  • 643 Downloads

Keywords

Arrival Time Temporal Difference Static Structure Temporal Order Input Sequence 

Dendrites are not static structures, new synaptic connections are established and old ones disappear. Moreover, it is now known that plasticity can vary with distance from the soma [1]. Consequently it is of great interest to combine learning algorithms with spatially extended neuron models. In particular this may shed further light on the computational advantages of plastic dendrites, say for direction selectivity or coincidence detection. Direction selective neurons fire for one spatio-temporal input sequence on their dendritic tree but stay silent if the temporal order is reversed [2], whilst "coincidence-detectors" such as those in the auditory brainstem are known to make use of dendrites to detect temporal differences in sound arrival times between ears to an astounding accuracy [3]. Here we develop one such combination of learning and dendritic dynamics by extending the "Spike-Diffuse-Spike" [4] framework of an active dendritic tree to incorporate both artificial (tempotron style [5]) and biological learning rules (STDP style [2]).

References

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Copyright information

© Svensson et al; licensee BioMed Central Ltd. 2007

This article is published under license to BioMed Central Ltd.

Authors and Affiliations

  • Carl-Magnus Svensson
    • 1
  • Stephen Coombes
    • 1
  • Yulia Timofeeva
    • 2
  1. 1.School of Mathematical SciencesUniversity of NottinghamNottinghamUK
  2. 2.Department of Computer ScienceUniversity of WarwickCoventryUK

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