Document Detail


Genetic selection on a behavioural fear trait is associated with changes in heart rate variability in quail.
MedLine Citation:
PMID:  16879617     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated whether genetic selection on a divergent behavioural trait of fearfulness (tonic immobility duration) was related to changes in the nervous control of the heart. Quail selected for either long or short tonic immobility (LTI or STI, respectively) duration was compared with an unselected control line (CTI). The autonomic control of the heart was assessed by heart rate variability analysis and pharmacological blockades. Quail were surgically fitted with a telemetric device. Heart rate before injection did not differ between the three lines. The vagal-sympathetic effect (VSE) at rest differed significantly from 1 in CTI and STI quail, suggesting that parasympathetic activity was dominant. In LTI quail, VSE did not differ from 1, suggesting a balance between parasympathetic and sympathetic activities. The intrinsic heart rate reached after the successive injections of propranolol and atropine did not differ between lines and was higher than the heart rate at rest in STI, which was in line with results of VSE at rest. After atropine injection, the sympathetic activity indicated by the low-frequency power was lower in CTI than in the two selected quail. After propranolol injection, the parasympathetic activity indicated by the root of the mean squares of successive differences and the high-frequency power was higher in STI than in CTI and LTI quail. Selection on tonic immobility duration thus appears to be associated with changes in the sympathovagal control of the heart, which may influence behavioural responses to stressful situations.
Authors:
D Valance; G Desprès; A Boissy; S Mignon-Grasteau; P Constantin; C Leterrier
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2006-07-27
Journal Detail:
Title:  Genes, brain, and behavior     Volume:  6     ISSN:  1601-1848     ISO Abbreviation:  Genes Brain Behav.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-05-23     Completed Date:  2007-08-17     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  101129617     Medline TA:  Genes Brain Behav     Country:  England    
Other Details:
Languages:  eng     Pagination:  339-46     Citation Subset:  IM    
Affiliation:
UMR 6175, Physiologie de la Reproduction et des Comportements, INRA Centre de Tours, Nouzilly, France.
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MeSH Terms
Descriptor/Qualifier:
Animals
Atropine / pharmacology
Coturnix / genetics*
Fear / physiology*
Female
Heart Rate / genetics*
Immobility Response, Tonic / physiology*
Parasympathetic Nervous System / drug effects,  physiology*
Parasympatholytics / pharmacology
Personality / genetics
Propranolol / pharmacology
Selection, Genetic
Species Specificity
Statistics, Nonparametric
Sympathetic Nervous System / drug effects,  physiology*
Sympatholytics / pharmacology
Time Factors
Vagus Nerve / drug effects,  physiology
Chemical
Reg. No./Substance:
0/Parasympatholytics; 0/Sympatholytics; 51-55-8/Atropine; 525-66-6/Propranolol

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


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