On the stationary state of Kohonen's self-organizing sensory mapping
Biological Cybernetics
Self-organization and associative memory: 3rd edition
Self-organization and associative memory: 3rd edition
Neural network simulation of somatosensory representational plasticity
Advances in neural information processing systems 2
A competitive distribution theory of neocortical dynamics
Neural Computation
Cortical map reorganization as a competitive process
Neural Computation
Self-organizing maps
Neural Computation and Self-Organizing Maps; An Introduction
Neural Computation and Self-Organizing Maps; An Introduction
Tonotopic representation of auditory responses using self-organizing maps
Mathematical and Computer Modelling: An International Journal
Topology preservation in self-organizing feature maps: exact definition and measurement
IEEE Transactions on Neural Networks
Self-organizing neural projections
Neural Networks - 2006 Special issue: Advances in self-organizing maps--WSOM'05
An unsupervised learning method for representing simple sentences
IJCNN'09 Proceedings of the 2009 international joint conference on Neural Networks
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Multiple adjacent, roughly mirror-image topographic maps are commonly observed in the sensory neocortex of many species. The cortical regions occupied by these maps are generally believed to be determined initially by genetically controlled chemical markers during development, with thalamocortical afferent activity subsequently exerting a progressively increasing influence over time. Here we use a computational model to show that adjacent topographic maps with mirror-image symmetry can arise from activity-dependent synaptic changes whenever the distribution radius of afferents sufficiently exceeds that of horizontal intracortical interactions. Which map edges become adjacent is strongly influenced by the probability distribution of input stimuli during map formation. Our results suggest that activity-dependent synaptic changes may play a role in influencing how adjacent maps become oriented following the initial establishment of cortical areas via genetically determined chemical markers. Further, the model unexpectedly predicts the occasional occurrence of adjacent maps with a different rotational symmetry. We speculate that such atypically oriented maps, in the context of otherwise normally interconnected cortical regions, might contribute to abnormal cortical information processing in some neurodevelopmental disorders.