Document Detail


Effects of selective lingual gustatory deafferentation on suprathreshold taste intensity discrimination of NaCl in rats.
MedLine Citation:
PMID:  15598149     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In rats, chorda tympani nerve transection (CTX) greatly increases the detection threshold of sodium chloride (NaCl) and severely disrupts salt discriminability. Here it is shown that CTX has surprisingly little effect, if any, on suprathreshold intensity discrimination. Glossopharyngeal nerve transection (GLX), which has no reported effect on salt sensibility, also did not affect performance. Rats were tested in a 2-response, operant taste intensity discrimination task. Difference thresholds for CTX rats were only slightly higher (-0.15 log/10 unit) than those for GLX and sham-transected rats, when 0.05 M served as the standard, and did not significantly differ when 0.1 M NaCl was the standard. Although the perceived intensity of NaCl might be reduced by CTX, input from remaining taste nerves sufficiently maintains the relative discriminability of suprathreshold NaCl concentrations.
Authors:
Connie L Colbert; Mircea Garcea; Alan C Spector
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Behavioral neuroscience     Volume:  118     ISSN:  0735-7044     ISO Abbreviation:  Behav. Neurosci.     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2004-12-15     Completed Date:  2005-02-14     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8302411     Medline TA:  Behav Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1409-17     Citation Subset:  IM    
Affiliation:
Psychology Department and Center for Smell and Taste, University of Florida, USA.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Animals
Behavior, Animal
Chorda Tympani Nerve / physiology*
Denervation
Differential Threshold / physiology
Discrimination Learning / physiology*
Glossopharyngeal Nerve / physiology*
Male
Rats
Rats, Sprague-Dawley
Saline Solution, Hypertonic / administration & dosage
Sodium Chloride*
Taste / physiology
Taste Buds / physiology
Taste Threshold / physiology*
Grant Support
ID/Acronym/Agency:
R01-DC01628/DC/NIDCD NIH HHS
Chemical
Reg. No./Substance:
0/Saline Solution, Hypertonic; 7647-14-5/Sodium Chloride

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


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