Niebur, Ernst and Koch, Christof (1994) A model for the neuronal implementation of selective visual attention based on temporal correlation among neurons. Journal of Computational Neuroscience, 1 (1). pp. 141-158. ISSN 0929-5313. http://resolver.caltech.edu/CaltechAUTHORS:20130816-103219051
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We propose a model for the neuronal implementation of selective visual attention based on temporal correlation among groups of neurons. Neurons in primary visual cortex respond to visual stimuli with a Poisson distributed spike train with an appropriate, stimulus-dependent mean firing rate. The spike trains of neurons whose receptive fields donot overlap with the “focus of attention” are distributed according to homogeneous (time-independent) Poisson process with no correlation between action potentials of different neurons. In contrast, spike trains of neurons with receptive fields within the focus of attention are distributed according to non-homogeneous (time-dependent) Poisson processes. Since the short-term average spike rates of all neurons with receptive fields in the focus of attention covary, correlations between these spike trains are introduced which are detected by inhibitory interneurons in V4. These cells, modeled as modified integrate-and-fire neurons, function as coincidence detectors and suppress the response of V4 cells associated with non-attended visual stimuli. The model reproduces quantitatively experimental data obtained in cortical area V4 of monkey by Moran and Desimone (1985).
|Additional Information:||Received November 2, 1993; Revised March 10, 1994; Accepted (in revised form) March 24, 1994. cKluwer Academic Publishers. We thank Francis Crick and Marius Usher for helpful discussions, Bob Desimone for providing us with part of Figure 3, and Wyeth Bair for writing the routines for computing the correlation functions. This work was supported by the Office of Naval Research, the Air Force Office of Scientific Research and the National Science Foundation.|
|Group:||Koch Laboratory, KLAB|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||KLAB Import|
|Deposited On:||11 Jan 2008 19:36|
|Last Modified:||03 Apr 2014 20:54|
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