The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging

Abstract Respiratory kinematics are important for the regulation of voice production. Dynamic MRI is an excellent tool to study respiratory motion providing high-resolution cross-sectional images. Unfortunately, in clinical MRI systems images can only be acquired in a horizontal subject position, wh...

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Autores principales:	Louisa Traser, Carmen Schwab, Fabian Burk, Ali Caglar Özen, Michael Burdumy, Michael Bock, Bernhard Richter, Matthias Echternach
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/31f4ef41cff541ad8923e9ddc70e23fc
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spelling	oai:doaj.org-article:31f4ef41cff541ad8923e9ddc70e23fc2021-11-28T12:21:22ZThe influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging10.1038/s41598-021-02152-y2045-2322https://doaj.org/article/31f4ef41cff541ad8923e9ddc70e23fc2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02152-yhttps://doaj.org/toc/2045-2322Abstract Respiratory kinematics are important for the regulation of voice production. Dynamic MRI is an excellent tool to study respiratory motion providing high-resolution cross-sectional images. Unfortunately, in clinical MRI systems images can only be acquired in a horizontal subject position, which does not take into account gravitational effects on the respiratory apparatus. To study the effect of body posture on respiratory kinematics during phonation, 8 singers were examined both in an open-configuration MRI with a rotatable gantry and a conventional horizontal MRI system. During dynamic MRI the subjects sang sustained tones at different pitches in both supine and upright body positions. Sagittal images of the respiratory system were obtained at 1–3 images per second, from which 6 anatomically defined distances were extracted to characterize its movements in the anterior, medium and posterior section of the diaphragm as well as the rip cage (diameter at the height of the 3rd and 5th rip) and the anterior–posterior position of the diaphragm cupola. Regardless of body position, singers maintained their general principles of respiratory kinematics with combined diaphragm and thorax muscle activation for breath support. This was achieved by expanding their chest an additional 20% during inspiration when singing in the supine position but not for sole breathing. The diaphragm was cranially displaced in supine position for both singing and breathing and its motion range increased. These results facilitate a more realistic extrapolation of research data obtained in a supine position.Louisa TraserCarmen SchwabFabian BurkAli Caglar ÖzenMichael BurdumyMichael BockBernhard RichterMatthias EchternachNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Louisa Traser Carmen Schwab Fabian Burk Ali Caglar Özen Michael Burdumy Michael Bock Bernhard Richter Matthias Echternach The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
description	Abstract Respiratory kinematics are important for the regulation of voice production. Dynamic MRI is an excellent tool to study respiratory motion providing high-resolution cross-sectional images. Unfortunately, in clinical MRI systems images can only be acquired in a horizontal subject position, which does not take into account gravitational effects on the respiratory apparatus. To study the effect of body posture on respiratory kinematics during phonation, 8 singers were examined both in an open-configuration MRI with a rotatable gantry and a conventional horizontal MRI system. During dynamic MRI the subjects sang sustained tones at different pitches in both supine and upright body positions. Sagittal images of the respiratory system were obtained at 1–3 images per second, from which 6 anatomically defined distances were extracted to characterize its movements in the anterior, medium and posterior section of the diaphragm as well as the rip cage (diameter at the height of the 3rd and 5th rip) and the anterior–posterior position of the diaphragm cupola. Regardless of body position, singers maintained their general principles of respiratory kinematics with combined diaphragm and thorax muscle activation for breath support. This was achieved by expanding their chest an additional 20% during inspiration when singing in the supine position but not for sole breathing. The diaphragm was cranially displaced in supine position for both singing and breathing and its motion range increased. These results facilitate a more realistic extrapolation of research data obtained in a supine position.
format	article
author	Louisa Traser Carmen Schwab Fabian Burk Ali Caglar Özen Michael Burdumy Michael Bock Bernhard Richter Matthias Echternach
author_facet	Louisa Traser Carmen Schwab Fabian Burk Ali Caglar Özen Michael Burdumy Michael Bock Bernhard Richter Matthias Echternach
author_sort	Louisa Traser
title	The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
title_short	The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
title_full	The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
title_fullStr	The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
title_full_unstemmed	The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
title_sort	influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/31f4ef41cff541ad8923e9ddc70e23fc
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The influence of gravity on respiratory kinematics during phonation measured by dynamic magnetic resonance imaging

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