Orientation selectivity using fast feed-forward inhibition: paper and Neuron simulation files

[Arnaud Delorme]

The following article

Delorme, A. (2003) Early Cortical Orientation Selectivity: How Fast 
Shunting Inhibition Decodes the Order of Spike Latencies. /Journal of 
Computational Neuroscience/, 15, 357-365. Author's PDF 
<http://www.sccn.ucsd.edu/%7Earno/mypapers/Delorme2003.pdf>, journal's 
link 
<http://ipsapp008.kluweronline.com/content/getfile/4835/47/5/fulltext.pdf>.

and the associated Neuron simulation files (documented) are available at

http://www.sccn.ucsd.edu/~arno/model.html

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Article abstract:

Following a flashed stimulus, I show that a simple neurophysiological 
mechanism in the primary visual system can generate orientation 
selectivity based on the first incoming spikes. A biological model of 
the lateral geniculate nucleus generates an asynchronous wave of spikes, 
with the most strongly activated neurons firing first. Geniculate 
activation leads to both the direct excitation of a cortical pyramidal 
cell and disynaptic feed-forward inhibition. The mechanism provides 
automatic gain control, so the cortical neurons respond over a wide 
range of stimulus contrasts. It also demonstrates the biological 
plausibility of a new computationally efficient neural code: latency 
rank order coding.

-- 

*Arnaud Delorme, Ph.D.*
Computational Neurobiology Lab, Salk Institute
10010 North Torrey Pines Road
La Jolla, CA 92037 USA

*Tel* : /(+1)-858-458-1927 ext 15/
*Fax* : /(+1)-858-458-1847/
*Web page *: www.sccn.ucsd.edu/~arno <http://www.sccn.ucsd.edu/%7Earno>
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