Document Detail


Parallel processing of sensory input by bursts and isolated spikes.
MedLine Citation:
PMID:  15128849     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Burst firing is commonly observed in many sensory systems and is proposed to transmit information reliably. Although a number of biophysical burst mechanisms have been identified, the relationship between burst dynamics and information transfer is uncertain. Electrosensory pyramidal cells have a well defined backpropagation-dependent burst mechanism. We used in vivo, in vitro, and modeling approaches to investigate pyramidal cell responses to mimics of behaviorally relevant sensory input. We found that within a given spike train, bursts are biased toward low-frequency events while isolated spikes simultaneously code for the entire frequency range. We also demonstrated that burst dynamics are essential for optimal feature detection but are not required for stimulus estimation. We conclude that burst and spike dynamics can segregate a single spike train into two parallel and complementary streams of information transfer.
Authors:
Anne-Marie M Oswald; Maurice J Chacron; Brent Doiron; Joseph Bastian; Leonard Maler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  24     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-05-06     Completed Date:  2004-09-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4351-62     Citation Subset:  IM    
Affiliation:
Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario K1G 2K4, Canada. ammoswald@yahoo.com
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MeSH Terms
Descriptor/Qualifier:
Action Potentials / physiology*
Afferent Pathways / physiology*
Animals
Computer Simulation
Electric Stimulation / methods
Gymnotiformes / physiology*
Models, Neurological*
Normal Distribution
Pyramidal Cells / physiology*
Signal Processing, Computer-Assisted

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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