Document Detail

Interaction of feedforward and feedback streams in visual cortex in a firing-rate model of columnar computations.
MedLine Citation:
PMID:  24632344     Owner:  NLM     Status:  Publisher    
Visual sensory input stimuli are rapidly processed along bottom-up feedforward cortical streams. Beyond such driving streams neurons in higher areas provide information that is re-entered into the representations and responses at the earlier stages of processing. The precise mechanisms and underlying functionality of such associative feedforward/feedback interactions are not resolved. This work develops a neuronal circuit at a level mimicking cortical columns with response properties linked to single cell recordings. The proposed model constitutes a coarse-grained model with gradual firing-rate responses which accounts for physiological in vitro recordings from mammalian cortical cells. It is shown that the proposed population-based circuit with gradual firing-rate dynamics generates responses like those of detailed biophysically realistic multi-compartment spiking models. The results motivate using a coarse-grained mechanism for large-scale neural network modeling and simulations of visual cortical mechanisms. They further provide insights about how local recurrent loops change the gain of modulating feedback signals.
Tobias Brosch; Heiko Neumann
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-28
Journal Detail:
Title:  Neural networks : the official journal of the International Neural Network Society     Volume:  54C     ISSN:  1879-2782     ISO Abbreviation:  Neural Netw     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-3-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8805018     Medline TA:  Neural Netw     Country:  -    
Other Details:
Languages:  ENG     Pagination:  11-16     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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