Document Detail


Control of ventilation during exercise in man with special reference to the feature at the onset.
MedLine Citation:
PMID:  7967216     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
When exercise starts, various cardiorespiratory adjustments take place for accommodating the greatly increased metabolic requirements. A rapid response in ventilation (Phase I) may be at least useful for preventing oxygen deficiency and for increasing alveolar ventilation, oxygen tension, and oxygen uptake even if it is minimal. But why is the increasing tidal volume and respiratory frequency elicited so quickly just at the onset of exercise? Dose rapid ventilatory response play an important role as a trigger for surviving in exercising man? It has hitherto been reported that phase I response is observed during not only voluntary and passive movement, but also during electrically induced muscle contraction in man. In addition, it was observed that ventilation in phase I is not affected by hypoxia and is not causally linked to cardiac output. Although these mechanisms have extensively been explored by many investigators, they have still remained obscure until now. At present, the causal factors of phase I are classified as central (descending) and peripheral (ascending) neurogenic stimulus, or as both. In the awake condition, abrupt ventilatory increment immediately after voluntary and passive exercise in man could be attributed to the drives from the central command including cortical and hypothalamic activities as well as some peripheral afferent information mainly through group III and IV fibers. However, further investigations to clarify many unsolved problems should be advanced in future.
Authors:
M Miyamura
Related Documents :
9504586 - High-frequency oscillatory ventilation versus conventional ventilation in a piglet mode...
9233746 - Effects of prolonged controlled mechanical ventilation on diaphragmatic function in hea...
7809566 - Ventilatory instability in patients with congestive heart failure and nocturnal cheyne-...
24206426 - Effects of dietary restriction or swimming on lymphocytes and macrophages functionality...
16973706 - Exercise-induced inhibition of angiotensin ii vasoconstriction in human thigh muscle.
12809196 - Intensive group training versus cognitive intervention in sub-acute low back pain: shor...
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  The Japanese journal of physiology     Volume:  44     ISSN:  0021-521X     ISO Abbreviation:  Jpn. J. Physiol.     Publication Date:  1994  
Date Detail:
Created Date:  1994-12-21     Completed Date:  1994-12-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985184R     Medline TA:  Jpn J Physiol     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  123-39     Citation Subset:  IM; S    
Affiliation:
Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Brain / physiology
Carotid Body / physiology
Hemodynamics
Humans
Leg / physiology
Models, Biological
Physical Exertion*
Respiration / physiology*

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


Previous Document:  A nationwide survey on the occurrence of Vogt-Koyanagi-Harada disease in Japan.
Next Document:  Neural activities in the fronto-opercular cortex of macaque monkeys during tasting and mastication.