A model of the summation pools within the layer 4 (area 17)

We propose a developmental model of the summation pools within the layer 4. The model is based on the modular structure of the neocortex and captures some of the known properties of layer 4. Connections between the orientation minicolumns are developed during exposure to visual input. Excitatory loc...

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Bibliographic Details
Published in:Neurocomputing (Amsterdam) 2005-06, Vol.65, p.167-172
Main Authors: Çürüklü, Baran, Lansner, Anders
Format: Article
Language:English
Subjects:
Bayesian confidence propagation neural network
cat visual-cortex
functional architecture
Horizontal connections
input
Response facilitation
simple cells
Summation pools
Visual cortex
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Summary:We propose a developmental model of the summation pools within the layer 4. The model is based on the modular structure of the neocortex and captures some of the known properties of layer 4. Connections between the orientation minicolumns are developed during exposure to visual input. Excitatory local connections are dense and biased towards the iso-orientation domain. Excitatory long-range connections are sparse and target all orientation domains equally. Inhibition is local. The summation pools are elongated along the orientation axis. These summation pools can facilitate weak and poorly tuned LGN input and explain improved visibility as an effect of enlargement of a stimulus.
ISSN:0925-2312
1872-8286
1872-8286
DOI:10.1016/j.neucom.2004.10.004