Accommodation of the abdomen to its content: integrated abdomino-thoracic response

Background  We previously showed that changes in intra‐abdominal content induce a volume‐dependent muscular response of the anterior abdominal wall and the diaphragm. We aimed to determine the contribution of the thorax to abdominal accommodation and the influence of the intra‐abdominal expansion ra...

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Bibliographic Details
Published in:Neurogastroenterology and motility 2012-04, Vol.24 (4), p.312-e162
Main Authors: Burri, E., Cisternas, D., Villoria, A., Accarino, A., Soldevilla, A., Malagelada, J.-R., Azpiroz, F.
Format: Article
Language:English
Subjects:
Abdomen
Abdomen - physiology
abdominal accommodation
abdominal distension
abdominal muscles
Abdominal wall
Adult
bloating
Colon
Diaphragm
Diaphragm - physiology
Electrodes
Electromyography
EMG
Esophagus
Female
Humans
intercostal muscles
intestinal gas
Male
Muscle Contraction - physiology
Muscle Relaxation - physiology
Muscle, Smooth - physiology
Thorax
Thorax - physiology
Ultrasonography
Young Adult
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Summary:Background  We previously showed that changes in intra‐abdominal content induce a volume‐dependent muscular response of the anterior abdominal wall and the diaphragm. We aimed to determine the contribution of the thorax to abdominal accommodation and the influence of the intra‐abdominal expansion rate. Methods  Gas (1440 mL total load) was infused into the colon of nine healthy subjects, while abdomino‐thoracic perimeters (by tape measure), electromyography (EMG) activity of the diaphragm (via six ring electrodes over an esophageal tube in the hiatus), intercostals and anterior abdominal wall (via five pairs of surface electrodes) and the position of the diaphragm by ultrasonography were measured. Infusion rates of 24, 48, and 96 mL min−1 were tested on separate days. Key Results  Gas infusion induced anterior abdominal wall contraction (18 ± 1% EMG increment; P 
ISSN:1350-1925
1365-2982
DOI:10.1111/j.1365-2982.2011.01846.x