A METHOD OF NONLINEAR ANALYSIS IN THE FREQUENCY DOMAIN (2008)
Jonathan Victorand, Robert Shapley, New York
ABSTRACT A method is developed for the analysis of nonlinear biological systems based on an input temporal signal that consists of a sum of a large number of sinusoids. Nonlinear properties of the...
effect of stimulus contrast (2008)
J. Andrew Henrie, Robert Shapley
power spectra in V1 cortex: the graded
Effects of Lateral Inhibition on Fluctuations of the Impulse Rate (2008)
ABSTRACT Inhibition from neighboring eccentric cells has an effect on the variability of firing of a given eccentric cell. The reduction in the average impulse rate which is caused by inhibition...
Visual Spatial Summation in Macaque Geniculocortical Afferents (2008)
Michael P. Sceniak, Michael J. Hawken, Robert Shapley, J Neurophysiol, J. Wielaard, P. Sajda, ...
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Dr. Stephen G. Lisberger, David Mclaughlin, Michael Shelley, Jacob Wielaard, Robert Shapley, Robert Shapley
Ferenc Mechler, Jonathan D. Victor, Keith P. Purpura, Robert Shapley
We show that spike timing adds to the information content of spike trains for transiently presented stimuli but not for comparable steady-state stimuli, even if the latter elicit transient responses....
McLaughlin, David, Shapley, Robert, Shelley, Michael, Wielaard, D. J.
In this paper, we offer an explanation for how selectivity for orientation could be produced by a model with circuitry that is based on the anatomy of V1 cortex. It is a network model of layer 4Cα...
An egalitarian network model for the emergence of simple and complex cells in visual cortex
Tao, Louis, Shelley, Michael, McLaughlin, David, Shapley, Robert
We explain how simple and complex cells arise in a large-scale neuronal network model of the primary visual cortex of the macaque. Our model consists of ≈4,000 integrate-and-fire, conductance-based...
Correlation of local and global orientation and spatial frequency tuning in macaque V1
Xing, Dajun, Ringach, Dario L, Shapley, Robert, Hawken, Michael J
Visual cortical neurones display a variety of visual properties. Among those that emerge in the primary visual cortex V1 are sharpening of selectivity for spatial frequency and for orientation. The...
McLaughlin, David, Shapley, Robert, Shelley, Michael, Wielaard, D. J.
In this paper, we offer an explanation for how selectivity for orientation could be produced by a model with circuitry that is based on the anatomy of V1 cortex. It is a network model of layer 4Cα...
An egalitarian network model for the emergence of simple and complex cells in visual cortex
Tao, Louis, Shelley, Michael, McLaughlin, David, Shapley, Robert
We explain how simple and complex cells arise in a large-scale neuronal network model of the primary visual cortex of the macaque. Our model consists of ≈4,000 integrate-and-fire, conductance-based...
Correlation of local and global orientation and spatial frequency tuning in macaque V1
Xing, Dajun, Ringach, Dario L, Shapley, Robert, Hawken, Michael J
Visual cortical neurones display a variety of visual properties. Among those that emerge in the primary visual cortex V1 are sharpening of selectivity for spatial frequency and for orientation. The...
Orientation selectivity in visual cortex by fluctuation-controlled criticality
Tao, Louis, Cai, David, McLaughlin, David W., Shelley, Michael J., Shapley, Robert
Within a large-scale neuronal network model of macaque primary visual cortex, we examined how intrinsic dynamic fluctuations in synaptic currents modify the effect of strong recurrent excitation on...
Effects of Lateral Inhibition on Fluctuations of the Impulse Rate
Inhibition from neighboring eccentric cells has an effect on the variability of firing of a given eccentric cell. The reduction in the average impulse rate which is caused by inhibition decreases the...
Fluctuations of the Impulse Rate in Limulus Eccentric Cells
Fluctuations in the discharge of impulses were studied in eccentric cells of the compound eye of the horseshoe crab, Limulus polyphemus. A theory is presented which accounts for the variability in...