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Competition Through Selective Inhibitory Synchrony

Rutishauser, Ueli and Slotine, Jean-Jacques and Douglas, Rodney J. (2012) Competition Through Selective Inhibitory Synchrony. Neural Computation, 24 (8). pp. 2033-2052. ISSN 0899-7667. doi:10.1162/neco_a_00304.

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Models of cortical neuronal circuits commonly depend on inhibitory feedback to control gain, provide signal normalization, and selectively amplify signals using winner-take-all (WTA) dynamics. Such models generally assume that excitatory and inhibitory neurons are able to interact easily because their axons and dendrites are colocalized in the same small volume. However, quantitative neuroanatomical studies of the dimensions of axonal and dendritic trees of neurons in the neocortex show that this colocalization assumption is not valid. In this letter, we describe a simple modification to the WTA circuit design that permits the effects of distributed inhibitory neurons to be coupled through synchronization, and so allows a single WTA to be distributed widely in cortical space, well beyond the arborization of any single inhibitory neuron and even across different cortical areas. We prove by nonlinear contraction analysis and demonstrate by simulation that distributed WTA subsystems combined by such inhibitory synchrony are inherently stable. We show analytically that synchronization is substantially faster than winner selection. This circuit mechanism allows networks of independent WTAs to fully or partially compete with other.

Item Type:Article
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URLURL TypeDescription (Zurich Open Repository and Archive)
Rutishauser, Ueli0000-0002-9207-7069
Additional Information:© 2012 Massachusetts Institute of Technology. Received October 3, 2011; accepted January 6, 2012. Posted Online June 12, 2012.
Issue or Number:8
Record Number:CaltechAUTHORS:20200407-133715842
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Official Citation:Competition Through Selective Inhibitory Synchrony. Ueli Rutishauser, Jean-Jacques Slotine, and Rodney J. Douglas. Neural Computation 2012 24:8, 2033-2052; doi: 10.1162/neco_a_00304
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102392
Deposited By: Tony Diaz
Deposited On:07 Apr 2020 21:09
Last Modified:03 Jun 2021 18:57

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