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Title of Journal: Eur J Appl Physiol

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Abbravation: European Journal of Applied Physiology

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Springer-Verlag

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DOI

10.1007/s004320050338

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1439-6327

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Studies on inspiratory and expiratory glossopharyn

Authors: Peter Lindholm Sven Nyrén
Publish Date: 2005/06/08
Volume: 94, Issue: 5-6, Pages: 646-651
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Abstract

Competitive breathhold divers use glossopharyngeal breathing in order to increase their performance Glossopharyngeal inhalation GI increases the volume of air in the lungs above the total lung capacity thereby increasing the volume of gas available for pressure equalization at great depth The reverse procedure glossopharyngeal exhalation GE is used to suck air out of the lungs at great depth when the lungs are compressed thus providing air in the mouth for equalization of pressure in the middle ear Five Swedish apnea athletes were tested Their vital capacity VC and the volume of air exhaled after GI were measured with a turbine spirometer while the residual volume RV and the volume of gas in the lungs following GE was determined using a helium dilution procedure Thereafter subjects performed these maneuvers during magnetic resonance imaging MRI of the thorax All subjects exhibited a higher VC + GI 78–119l than VC 62–95l and lower RV–GE 116–177l than RV 137–240l MRI revealed pronounced changes in the volume of intrathoracic blood with a small heart and compressed vessels following GI and the opposite ie enlarged vessels during GE MRI also showed an invagination of the posterior wall of the trachea in connection with GE in certain subjects

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