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Stimulus detection after interruption of the feedforward response in a backward masking paradigm.
MedLine Citation:
PMID:  24082965     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
In backward masking, a target stimulus is rendered invisible by the presentation of a second stimulus, the mask. When the mask is effective, neural responses to the target are suppressed. Nevertheless, weak target responses sometimes may produce a behavioural response. It remains unclear whether the reduced target response is a purely feedforward response or that it includes recurrent activity. Using a feedforward neural network of biological plausible spiking neurons, we tested whether a transient spike burst is sufficient for face categorization. After training the network, the system achieved face/non-face categorization for sets of grayscale images. In a backward masking paradigm, the transient burst response was cut off thereby reducing the feedforward target response. Despite the suppressed feedforward responses stimulus classification remained robust. Thus according to our model data stimulus detection is possible with purely, suppressed feedforward responses.
Authors:
August Romeo; Maria Sole Puig; Laura Pérez Zapata; Joan Lopez-Moliner; Hans Supèr
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Publication Detail:
Type:  Journal Article     Date:  2012-02-14
Journal Detail:
Title:  Cognitive neurodynamics     Volume:  6     ISSN:  1871-4080     ISO Abbreviation:  Cogn Neurodyn     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2013-10-01     Completed Date:  2013-10-01     Revised Date:  2013-10-17    
Medline Journal Info:
Nlm Unique ID:  101306907     Medline TA:  Cogn Neurodyn     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  459-66     Citation Subset:  -    
Affiliation:
Department of Basic Psychology, Faculty of Psychology, University of Barcelona (UB), Pg. Vall d' Hebron 171, 08035 Barcelona, Spain.
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