Hebb-type dynamics is sufficient to account for the inverse magnification rule in cortical somatotopy

Authors:
Kamil A. Grajski;Michael M. Merzenich
Affiliations:
Coleman Memorial Laboratories, University of California, San Francisco, CA 94143 USA;Coleman Memorial Laboratories, University of California, San Francisco, CA 94143 USA
Venue:
Neural Computation
Year:
1990

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Abstract

The inverse magnification rule in cortical somatotopy is the experimentally derived inverse relationship between cortical magnification (area of somatotopic map representing a unit area of skin surface) and receptive field size (area of restricted skin surface driving a cortical neuron). We show by computer simulation of a simple, multilayer model that Hebb-type synaptic modification subject to competitive constraints is sufficient to account for the inverse magnification rule.