Document Detail


The role of Hopf bifurcation dynamics in sensory processes.
MedLine Citation:
PMID:  20382169     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We emphasize here the role of the Hopf bifurcation in detection of stimuli in sensory processes--we discuss in particular chemosensors. It is shown that the essential nonlinearities inherent in the signal transduction mechanism can take advantage of the noise from the environment the system is subject to, to display a highly amplified response to stimuli in a frequency-selective manner. It is shown that in the absence of any externally applied stimulus, the feedback mechanisms playing a regulatory role in the transduction mechanism can give rise, in the presence of noise, to peaks in the spectral power density, suggesting enhanced spontaneous activity in sensory cells. The power law in this spectrum is determined.
Authors:
J Balakrishnan; B Ashok
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Publication Detail:
Type:  Journal Article     Date:  2010-04-09
Journal Detail:
Title:  Journal of theoretical biology     Volume:  265     ISSN:  1095-8541     ISO Abbreviation:  J. Theor. Biol.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-06-14     Completed Date:  2010-09-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376342     Medline TA:  J Theor Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  126-35     Citation Subset:  IM    
Copyright Information:
(c) 2010 Elsevier Ltd. All rights reserved.
Affiliation:
School of Physics, University of Hyderabad, Central University P.O., Gachi Bowli, Hyderabad 500 046, India. jbsp@uohyd.ernet.in
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MeSH Terms
Descriptor/Qualifier:
Nonlinear Dynamics
Physical Stimulation
Sensation / physiology*

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