Document Detail


Environmental noise alters gastric myoelectrical activity: Effect of age.
MedLine Citation:
PMID:  17230609     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: To evaluate the effect of age and acoustic stress on gastric myoelectrical activity (GMA) and autonomic nervous system function.
METHODS: Twenty-one male subjects (age range 22-71 years, mean 44 years) were recruited and exposed, in random order, to three auditory stimuli (Hospital noise, conversation babble and traffic noise) after a 20-min baseline. All periods lasted 20 min and were interspersed with a 10 min of recovery. GMA was obtained using a Synectics Microdigitrapper. Autonomic nerve function was assessed by monitoring blood pressure and heart rate using an automatic recording device.
RESULTS: Dominant power tended to decrease with increase of age (P < 0.05). The overall percentage of three cycle per minute (CPM) activity decreased during exposure to hospital noise (12.0%, P <0.05), traffic noise (13.9%, P < 0.05), and conversation babble (7.1%). The subjects in the younger group (< 50 years) showed a consistent reduction in the percentage of 3 CPM activity during hospital noise (22.9%, P < 0.05), traffic noise (19.0%, P < 0.05), and conversation babble (15.5%). These observations were accompanied by a significant increase in bradygastria: hospital noise (P < 0.05) and traffic noise (P < 0.05). In contrast, the subjects over 50 years of age did not exhibit a significant decrease in 3 CPM activity. Regardless of age, noise did not alter blood pressure or heart rate.
CONCLUSION: GMA changes with age. Loud noise can alter GMA, especially in younger individuals. Our data indicate that even short-term exposure to noise may alter the contractility of the stomach.
Authors:
James-S Castle; Jin-Hong Xing; Mark-R Warner; Mark-A Korsten
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  World journal of gastroenterology : WJG     Volume:  13     ISSN:  1007-9327     ISO Abbreviation:  World J. Gastroenterol.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-18     Completed Date:  2007-03-22     Revised Date:  2014-09-07    
Medline Journal Info:
Nlm Unique ID:  100883448     Medline TA:  World J Gastroenterol     Country:  China    
Other Details:
Languages:  eng     Pagination:  403-7     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Age Factors
Aged
Autonomic Pathways / physiology
Electrophysiology
Gastrointestinal Motility / physiology*
Humans
Male
Middle Aged
Noise / adverse effects*
Stomach / physiology*
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