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- M. Stetter, E. W. Lang, and
K. Obermayer. Synapse Clustering Can Drive Simultaneous ON-OFF and
Ocular Dominance Segregation in a Model of Area 17.
.
In W. Gerstner, A. Germond, M. Hasler, and J. Nicoud, editors, Artificial
Neural Networks - ICANN 97, pages 189-194. Springer-Verlag, 1997.
(FTP Gzipped PostScript, 6 pages, 79 kb)
In the primary visual cortex of monkeys, the development of ocular
dominance and orientation selectivity is at least partially driven by neural
activity . We propose a modified Hebb-type learning mechanism, which takes
into account non-sp ecific components of activity-dependent synaptic
modification. It is shown analytically , that o cular dominance and
ON-OFF-segregation occur simultaneously in a linear network as soon as
left-eye and right-eye synapses tend to cluster on the surface of the
postsynaptic neuron. Simulations show, that this mechanism is robust against
the introduction of network nonlinearities such as rectifying transfer
functions and in tracortical recurrency. The results imply, that details of
single cell properties can have considerable influence on the behaviour of
high level developmental models.
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