Document Detail

Vagal control of respiratory pattern during hyperpnea in domestic fowl.
MedLine Citation:
PMID:  6429108     Owner:  NLM     Status:  MEDLINE    
Minute volume, tidal volume, and respiratory frequency were measured during hyperpnea induced by exercise, increased body temperature, and CO2 inhalation. Ventilatory characteristics were compared before and after the vagus nerve had been blocked. In normal birds exercise produced increases in both tidal volume and respiratory frequency; hyperthermia produced a typical thermal polypnea consisting of greatly increased respiratory frequency and reduced tidal volume; CO2 inhalation produced increases in tidal volume and respiratory frequency when the birds were euthermic but a slowing of respiratory rate when the birds were hyperthermic. After vagal block these pronounced differences in the pattern of ventilatory response to the various respiratory stimuli were abolished. Instead there was a uniform ventilatory response to all three stimuli consisting mainly of increases in tidal volume combined with small increases in respiratory frequency. It is concluded that in the normal animal control of the varied pattern of ventilatory response to different respiratory stimuli is dependent on vagal fiber activity.
M Gleeson; J H Brackenbury
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  56     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1984 Jun 
Date Detail:
Created Date:  1984-08-23     Completed Date:  1984-08-23     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1650-4     Citation Subset:  IM    
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MeSH Terms
Body Temperature
Carbon Dioxide / pharmacology
Nerve Block
Poultry / physiology*
Respiration* / drug effects
Tidal Volume
Vagus Nerve / physiology*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 59-46-1/Procaine

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

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