An American text-book of physiology . the thorax in the antero-posterior and lateral diameters. Movements of the Ribs.—Tiie movements of the rii)> during inspirationare, as a whole, essentially rotations upward and outward ujwn axes which aredirected obliquely outward and backward, each axis being directed throughthe costo-vertebral articulation and a little anterior to the costo-transversearticulation. The vertebral ends of the ribs lie higher than their sternalextremities, so that when the ribs are elevated the anterior ends are advancedforward and upward. The arches of the ribs are incli
An American text-book of physiology . the thorax in the antero-posterior and lateral diameters. Movements of the Ribs.—Tiie movements of the rii)> during inspirationare, as a whole, essentially rotations upward and outward ujwn axes which aredirected obliquely outward and backward, each axis being directed throughthe costo-vertebral articulation and a little anterior to the costo-transversearticulation. The vertebral ends of the ribs lie higher than their sternalextremities, so that when the ribs are elevated the anterior ends are advancedforward and upward. The arches of the ribs are inclined downward andoutward, and, owing to the obliquity of the axes of rotation, the convexitiesare rotated upward and outward, or everted. Thus both the antero-posteriorand lateral diameters are increased. The degree of obliquity of the axes of rotation of the different ribs axis of the first rib is almost transverse (Fig. ), while that of eachsucceeding rib to the ninth, inclusive, becomes more oblique (Fig. 132). The.
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Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
