Document Detail

Functions of the mastoid cell system: auto-regulation of temperature and gas pressure.
MedLine Citation:
PMID:  12625880     Owner:  NLM     Status:  MEDLINE    
This article presents a new approach to understanding the physiological functions of the mastoid cell system. It is suggested that the cell system, in combination with the continuous blood flow through the adjacent large vessels, makes up a compound functional unit that serves to protect the sensitive vestibular part of the inner ear from inadequate stimulation by external temperature changes. By virtue of the large surface area of the cell system mucosa with respect to the enclosed gas volume, the mastoid cell system may also work as a pressure regulator. Variations of the bi-directional exchange of fluid over the capillary network in the mucosa will change the size of the lumen that is available for the gas in the cell system. Volumes of gas and fluid can thus be exchanged to keep the intratympanic pressure within physiological limits. The process is most effective in a cell system with a high area-to-volume ratio.
Bengt Magnuson
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  The Journal of laryngology and otology     Volume:  117     ISSN:  0022-2151     ISO Abbreviation:  J Laryngol Otol     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-03-10     Completed Date:  2003-04-17     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8706896     Medline TA:  J Laryngol Otol     Country:  England    
Other Details:
Languages:  eng     Pagination:  99-103     Citation Subset:  AIM; IM    
Department of Otolaryngology, Linköping University Hospital, Linköping, Sweden.
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MeSH Terms
Circadian Rhythm / physiology
Ear, Middle / physiology*
Homeostasis / physiology*
Mastoid / physiology*
Reg. No./Substance:

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