Document Detail

Dipole source localization by mottled sculpin. III. Orientation after site-specific, unilateral denervation of the lateral line system.
MedLine Citation:
PMID:  9763703     Owner:  NLM     Status:  MEDLINE    
To test the hypothesis that spatial excitation patterns along the lateral-line system underlie source localization, we videotaped the orientation behavior of blinded mottled sculpin in response to a small dipole source (50-Hz vibrating sphere) before and after unilateral denervation of the lateral line system on different body regions (head, trunk and head + trunk). Approach pathways were qualitatively similar to those followed by normal intact animals. Abnormal behavior (turning in circles) was not observed. However, the frequency with which fish placed their intact side facing the source increased by 12-89%, depending on the denervation site. The angular accuracy of orientation decreased by 20 degrees to 60 degrees (100% to 370% change) depending on source location and region of lateral line denervated. Deficits tended to be site-specific. For example, unilaterally denervating lateral-line organs on the head resulted in less accurate orienting responses when the source was located on the denervated side of the head, but not on the opposite side of the head or on either side of the trunk. Site-specific deficits and the absence of abnormal approach pathways argue that animals are relying on a point-by-point spatial representation of source location along the sensory surface rather than computations based on bilateral comparisons.
R A Conley; S Coombs
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of comparative physiology. A, Sensory, neural, and behavioral physiology     Volume:  183     ISSN:  -     ISO Abbreviation:  J. Comp. Physiol. A     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1998-11-06     Completed Date:  1998-11-06     Revised Date:  2014-07-21    
Medline Journal Info:
Nlm Unique ID:  8413199     Medline TA:  J Comp Physiol A     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  335-44     Citation Subset:  IM    
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MeSH Terms
Behavior, Animal / physiology
Fishes / physiology*
Functional Laterality / physiology
Neural Pathways / physiology
Orientation / physiology*
Physical Stimulation
Sense Organs / physiology*
Grant Support
5 P01 DC 00293-11/DC/NIDCD NIH HHS

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