Results 1 - 10 of 47

Prediction and Decoding of Retinal Ganglion Cell Responses with a Probabilistic Spiking Model

by Jonathan W. Pillow, Liam Paninski, Valerie J. Uzzell, Eero P. Simoncelli, E. J. Chichilnisky , 2005
"... ... generation. We show that the stimulus selectivity, reliability, and timing precision of primate retinal ganglion cell (RGC) light responses can be reproduced accurately with a simple model consisting of a leaky integrate-and-fire spike generator driven by a linearly filtered stimulus, a postspik ..."
Abstract - Cited by 66 (21 self) - Add to MetaCart
... generation. We show that the stimulus selectivity, reliability, and timing precision of primate retinal ganglion cell (RGC) light responses can be reproduced accurately with a simple model consisting of a leaky integrate-and-fire spike generator driven by a linearly filtered stimulus, a

Prediction and Decoding of Retinal Ganglion Cell Responses with a Probabilistic Spiking Model

by Jonathan W. Pillow, Liam Paninski, Valerie J. Uzzell, Eero P. Simoncelli, E. J. Chichilnisky , 2005
"... ... generation. We show that the stimulus selectivity, reliability, and timing precision of primate retinal ganglion cell (RGC) light responses can be reproduced accurately with a simple model consisting of a leaky integrate-and-fire spike generator driven by a linearly filtered stimulus, a postspik ..."
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... generation. We show that the stimulus selectivity, reliability, and timing precision of primate retinal ganglion cell (RGC) light responses can be reproduced accurately with a simple model consisting of a leaky integrate-and-fire spike generator driven by a linearly filtered stimulus, a

Responses of macaque ganglion cells and human observers to compound periodic waveforms,’’ Vision Res. 33

by Jan Kremers, T Barry B. Lee, Joel Pokorny, Vivianne C. Smiths , 1997
"... We measured responses of macaque retinal ganglion cells to different periodic waveforms (sinusoidal, square, rapid-on and rapid-off sawtooth waveforms) for both luminance and equilumlnant chromatic modulation. We analyzed the responses with a peak-to-trough detector. At low frequencies, on-center an ..."
Abstract - Cited by 24 (3 self) - Add to MetaCart
We measured responses of macaque retinal ganglion cells to different periodic waveforms (sinusoidal, square, rapid-on and rapid-off sawtooth waveforms) for both luminance and equilumlnant chromatic modulation. We analyzed the responses with a peak-to-trough detector. At low frequencies, on

What simple and complex cells compute

by Matteo Carandini
"... Visual neuroscientists seek to answer two related questions. First, what does the visual system do? Second, how does it do it? While an answer to the second question is a description based on anatomy and biophysics, an answer to the first question is a description of computations performed on images ..."
Abstract - Cited by 8 (0 self) - Add to MetaCart
. An influential view emerged that described retinal ganglion cells as linear filters, i.e. as processes that compute a weighted sum of the intensities in the stimulus, with weights given by the receptive field (Enroth-Cugell & Robson, 1966). This simple ‘linear model ’ applied to the majority of ganglion

Perimetric Defects and Ganglion Cell Damage: Interpreting Linear Relations Using a Two-Stage Neural Model

by William H Swanson , Joost Felius , Fei Pan , William H Swanson , Glaucoma Institute
"... PURPOSE. To better understand the relations between glaucomatous perimetric defects and ganglion cell damage, a neural model was developed to interpret empiric findings on linear relations between perimetric defects and measures of ganglion cell loss. METHODS. A two-stage model computed responses o ..."
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PURPOSE. To better understand the relations between glaucomatous perimetric defects and ganglion cell damage, a neural model was developed to interpret empiric findings on linear relations between perimetric defects and measures of ganglion cell loss. METHODS. A two-stage model computed responses

Impact of morphometry, myelinization and synaptic current strength on spike conduction in human and cat spiral ganglion neurons,” PLoS

by Frank Rattay, Thomas Potrusil, Cornelia Wenger, Andrew K. Wise, Rudolf Glueckert, Anneliese Schrott-fischer - One , 2013
"... Background: Our knowledge about the neural code in the auditory nerve is based to a large extent on experiments on cats. Several anatomical differences between auditory neurons in human and cat are expected to lead to functional differences in speed and safety of spike conduction. Methodology/Princi ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
neurons of the cat are entirely myelinated. Biophysical model evaluation showed delayed and weak spikes in the human soma region as a consequence of a lack of myelin. The simulated spike conduction times are in accordance with normal interwave latencies from auditory brainstem response recordings from man

Predicting responses of nonlinear neurons in monkey striate cortex to complex patterns

by Sidney R. Lehky, Terrence J. Sejnowski, Robert Desimone - Journal of Neuroscience , 1992
"... The overwhelming majority of neurons in primate visual cor-tex are nonlinear. For those ceils, the techniques of linear system analysis, used with some success to model retinal ganglion cells and striate simple cells, are of limited appli-cability. As a start toward understanding the properties of n ..."
Abstract - Cited by 10 (1 self) - Add to MetaCart
The overwhelming majority of neurons in primate visual cor-tex are nonlinear. For those ceils, the techniques of linear system analysis, used with some success to model retinal ganglion cells and striate simple cells, are of limited appli-cability. As a start toward understanding the properties

Direction Selectivity in a Model of the Starburst Amacrine Cell

by John J. Tukker , W. Rowland Taylor, Robert G. Smith , 2004
"... The starburst amacrine cell (SBAC), found in all mammalian retinas, is thought to provide the directional inhibitory input recorded in On--Off direction-selective ganglion cells (DSGCs). While voltage recordings from the somas of SBACs have not shown robust direction selectivity (DS), the dendriti ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
, especially at high velocities and low spatial frequencies. The sine-wave DS responses could be accounted for by a simple mathematical model, which summed phase-shifted signals from soma and dendritic tip. By

Dynamic Responses of Electrically Coupled Systems

by Nelson G
"... ABSTRACT An identified pair of electrically coupled neurons in the buccal ganglion ofthe freshwater snail Helisoma trivolvis is an experimentally accessible model of electrical synaptic transmission. In this investigation, electrical synaptic transmission is characterized using (a) sinusoidal freque ..."
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frequency (Bode) responses computed by Laplace transforms and (6) responses to brief stimuli. The frequency response of the injected neuron shows a 20-dB/decade attenuation and a phase shift from 0 ° at low frequencies to-90 ' at high frequencies. The response of a coupled cell shows a 40-d

Y.: A retinal mechanism based color constancy model

by Shaobing Gao, Yongjie Li - In: Proceeding of Chinese Conference on Pattern Recognition (CCPR), CCIS 321 , 2012
"... Abstract. It has been generally accepted that the retina is the first level that plays critical role in the function of color constancy in human visual system. In this paper we propose a computational model which imitates the neural mechanisms of color information processing in retina. In this model ..."
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. In this model we first compute a simple statistics of reflectance about the real scene by simulating bipolar cells. Then, the ganglion cells (e.g., the midget cells) receive both the computational statistics of reflectance of the scene from bipolar cells and the response from horizontal cells as well
Results 1 - 10 of 47