Document Detail

Effects of stretch receptors of bronchi or trachea on genioglossus muscle activity.
MedLine Citation:
PMID:  3575910     Owner:  NLM     Status:  MEDLINE    
Activity of genioglossus muscle (GG) was recorded in anesthetized rabbits at control and under SO2 block of slowly adapting stretch receptors in thoracic airways (T) or in bronchi alone (B). At control peak activity occurred at 10% of inspiratory time, followed by a slight and a marked decrease. T and, particularly, B delayed onset and slowed rise of GG activity; then, this increased slightly under T and more under B, becoming greater than at control. During inspiratory efforts at end-expiratory volume GG activity at control was equal to that during open inspirations up to its peak, then progressively greater; during inspiratory efforts GG activity under T and B was equally smaller than at control. These findings indicate that bronchial input facilitates GG activity at end-expiratory volume and inhibits it at larger volumes: these effects are greater than those previously detected on diaphragm. Moreover, tracheal input inhibits onset and development of GG activity. Under all conditions end of inspiratory activity was simultaneous in GG and in diaphragm. Time to peak inspiratory flow correlated with time to early peak in GG activity.
E Agostoni; A M Cavagna; G Citterio
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Respiration physiology     Volume:  67     ISSN:  0034-5687     ISO Abbreviation:  Respir Physiol     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-06-12     Completed Date:  1987-06-12     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0047142     Medline TA:  Respir Physiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  335-45     Citation Subset:  IM; S    
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MeSH Terms
Adaptation, Physiological
Bronchi / innervation*
Mechanoreceptors / physiology*
Muscles / physiology*
Respiratory Muscles / physiology
Tongue / physiology*
Trachea / innervation*

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