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Oscillatory Neural Networks with Self-Organized Segmentation of Overlapping Patterns

Thomas.Burwick{at}neuroinformatik.rub.de Institut für Neuroinformatik, Ruhr-Universität Bochum, 44306 Bochum, Germany

Temporal coding is considered with an oscillatory network model that generalizes the Cohen-Grossberg-Hopfield model. It is assumed that the frequency of oscillating units increases with stronger and more coherent input. We refer to this mechanism as acceleration. In the context of Hebbian memory, synchronization and acceleration take complementary roles, and their combined effect on the storage of patterns is profound. Acceleration implies the desynchronization that is needed for self-organized segmention of two overlapping patterns. The superposition problem is thereby solved even without including competition couplings. With respect to brain dynamics, we point to analogies with oscillation spindles in the gamma range and responses to perceptual rivalries.

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				T. Burwick Temporal Coding: Assembly Formation Through Constructive Interference Neural Comput., July 1, 2008; 20(7): 1796 - 1820. [Abstract] [Full Text] [PDF]