Departmental Papers (BE)

Document Type

Conference Paper

Date of this Version

5-23-2005

Comments

Copyright IEEE 2005. Reprinted from:
Lam, S.Y.M.; Shi, B.E.; Boahen, K.A., "Self-organized cortical map formation by guiding connections," Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on , vol., no., pp. 5230-5233 Vol. 5, 23-26 May 2005

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Abstract

We describe an algorithm for self-organizing connections from a source array to a target array of neurons that is inspired by neural growth cone guidance. Each source neuron projects a Gaussian pattern of connections to the target layer. Learning modifies the pattern center location. The small number of parameters required to specify connectivity has enabled this algorithm's implementation in a neuromorphic silicon system. We demonstrate that this algorithm can lead to topographic feature maps similar to those observed in the visual cortex, and characterize its operation as function maximization, which connects this approach with other models of cortical map formation.

Keywords

Gaussian distribution, neural nets, self-organising feature maps, function maximization, guiding connections, learning modified pattern center location, neural growth cone guidance, neuromorphic silicon systems, self-organized cortical map formation, source neuron Gaussian connection pattern, source/target array self-organizing connections, topographic feature maps, visual cortex

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Date Posted: 13 July 2009