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Cerebral Cortex, Vol. 11, No. 12, 1144-1149, December 2001
© 2001 Oxford University Press

Dendritic Inhibition Enhances Neural Coding Properties

M.W. Spratling and M.H. Johnson

Centre for Brain and Cognitive Development, Birkbeck College, London, UK

M. W. Spratling, Centre for Brain and Cognitive Development, Birkbeck College, 32 Torrington Square, London WC1E 7JL, UK. Email: m.spratling{at}bbk.ac.uk.

The presence of a large number of inhibitory contacts at the soma and axon initial segment of cortical pyramidal cells has inspired a large and influential class of neural network model that use post-integration lateral inhibition as a mechanism for competition between nodes. However, inhibitory synapses also target the dendrites of pyramidal cells. The role of this dendritic inhibition in competition between neurons has not previously been addressed. We demonstrate, using a simple computational model, that such pre-integration lateral inhibition provides networks of neurons with useful representational and computational properties that are not provided by post-integration inhibition.


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