Document Detail

Stochastic pulse stimulation in chemoreceptors and its properties.
MedLine Citation:
PMID:  14766098     Owner:  NLM     Status:  MEDLINE    
Orientation towards food and mate, especially in insects, is an olfactory-controlled behavior which relies on the detection of small amounts of odorant molecules delivered in turbulent atmospheric conditions, so that randomness in magnitude and time is a major feature of the natural stimulus. The effect of random delivery on the initial step of olfactory transduction, the formation of the receptor-ligand complex, is analyzed in the case of the moth pheromonal system. Two types of randomness are compared, Gaussian (regular) and exponential (irregular). The influence of noise is quantified either with the maxima of the receptor-ligand complex, or with the times at which the concentration of complex crosses a given threshold level. It is shown that the stochastic features of the stimulus helps its detection and that the exponential distribution appears not only as a better description of the natural stimulus, but also as the most efficient from a biological point of view.
Jean Pierre Rospars; Petr Lánský
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Mathematical biosciences     Volume:  188     ISSN:  0025-5564     ISO Abbreviation:  Math Biosci     Publication Date:    2004 Mar-Apr
Date Detail:
Created Date:  2004-02-09     Completed Date:  2004-05-06     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0103146     Medline TA:  Math Biosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  133-45     Citation Subset:  IM    
Unité de Phytopharmacie et Médiateurs chimiques, INRA, 78026 Versailles cedex, France.
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MeSH Terms
Chemoreceptor Cells / physiology*
Models, Neurological*
Stimulation, Chemical
Stochastic Processes

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