Document Detail

The role of sensory network dynamics in generating a motor program.
MedLine Citation:
PMID:  16237184     Owner:  NLM     Status:  MEDLINE    
Sensory input plays a major role in controlling motor responses during most behavioral tasks. The vestibular organs in the marine mollusk Clione, the statocysts, react to the external environment and continuously adjust the tail and wing motor neurons to keep the animal oriented vertically. However, we suggested previously that during hunting behavior, the intrinsic dynamics of the statocyst network produce a spatiotemporal pattern that may control the motor system independently of environmental cues. Once the response is triggered externally, the collective activation of the statocyst neurons produces a complex sequential signal. In the behavioral context of hunting, such network dynamics may be the main determinant of an intricate spatial behavior. Here, we show that (1) during fictive hunting, the population activity of the statocyst receptors is correlated positively with wing and tail motor output suggesting causality, (2) that fictive hunting can be evoked by electrical stimulation of the statocyst network, and (3) that removal of even a few individual statocyst receptors critically changes the fictive hunting motor pattern. These results indicate that the intrinsic dynamics of a sensory network, even without its normal cues, can organize a motor program vital for the survival of the animal.
Rafael Levi; Pablo Varona; Yuri I Arshavsky; Mikhail I Rabinovich; Allen I Selverston
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; 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:  25     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-10-20     Completed Date:  2006-03-15     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9807-15     Citation Subset:  IM    
Institute for Nonlinear Science, University of California, San Diego, La Jolla, California 92093-0402, USA.
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MeSH Terms
Action Potentials / physiology*
Motor Activity / physiology*
Nerve Net / physiology*
Sensory Receptor Cells / physiology*
Grant Support

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