Geometry and respiratory displacement of human ribs

T. A Wilson; K Rehder; S Krayer; E. A Hoffman; C. G Whitney; J. R Rodarte

doi:10.1152/jappl.1987.62.5.1872

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Geometry and respiratory displacement of human ribs

Journal article

Peer reviewed

Geometry and respiratory displacement of human ribs

T. A Wilson, K Rehder, S Krayer, E. A Hoffman, C. G Whitney and J. R Rodarte

Journal of applied physiology (1985), Vol.62(5), pp.1872-1877

1987

DOI: 10.1152/jappl.1987.62.5.1872

PMID: 3597261

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Abstract

The three-dimensional coordinates of points in the ribs of two supine relaxed males, holding their breath at functional residual capacity (FRC) and with their glottis closed at total lung capacity (TLC), were obtained from volumetric X-ray computed tomographical images. The orientation of planes that best fit the data for each rib at each lung volume and the circular arcs that fit the points in the planes of the ribs were determined, and average values of these geometrical parameters for ribs 3-7 are reported. The planes of the ribs at TLC can be described as displaced from the planes at FRC by a rotation about an axis that passes near the spine. The pump handle and bucket handle components of rotation are 11 and 13°, respectively, for rib 3 and both decrease with increasing rib number to 7 and 10° at rib 7. The angles between the axes of rotation and the midplane are ~35° for all 5 ribs. The radii of the circular arcs fit to the data at TLC are slightly larger than those at FRC, and this suggests that there is a small component of rotation normal to the plane of the rib.

Air breathing

Biological and medical sciences

Fundamental and applied biological sciences. Psychology

Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics

Vertebrates: respiratory system

Details

Title: Subtitle: Geometry and respiratory displacement of human ribs
Creators: T. A Wilson - University of Minnesota
K Rehder - Univ. Minnesota, dep. aerospace eng. & mechanics, Minneapolis MN 55455, United States
S Krayer - Univ. Minnesota, dep. aerospace eng. & mechanics, Minneapolis MN 55455, United States
E. A Hoffman - University of Minnesota
C. G Whitney - Univ. Minnesota, dep. aerospace eng. & mechanics, Minneapolis MN 55455, United States
J. R Rodarte - Univ. Minnesota, dep. aerospace eng. & mechanics, Minneapolis MN 55455, United States
Resource Type: Journal article
Publication Details: Journal of applied physiology (1985), Vol.62(5), pp.1872-1877
Publisher: American Physiological Society
DOI: 10.1152/jappl.1987.62.5.1872
PMID: 3597261
ISSN: 8750-7587
eISSN: 1522-1601
Language: English
Date published: 1987
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Radiology; Internal Medicine
Record Identifier: 9984318705102771

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