This Article  • References  • Full text PDF  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

EPHRAIM KOROL, M.D.

Arch Intern Med. 1933;51(2):264-278.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Paradoxical breathing means the deflation of a lung or of a portion of a lung during the phase of inspiration and the inflation of the lung during the phase of expiration.

Paradoxical breathing occurs in all air-breathing vertebrates. It depends on the same anatomic factors as the residual air and seems to serve the same purpose.

DATA FROM COMPARATIVE PHYSIOLOGY

During the evolution of the air-breathing apparatus, provisions were necessary for the dilution of the oxygen of the air,¹ and for its saturation with moisture. In the water, where the amphibian ancestors of modern man lived, the concentration of oxygen is less than 1 per cent; in the atmosphere the concentration is nearly 20 per cent. Among the morphologic adaptations to air breathing, the following are of interest:

1. The respiratory passages become long and narrow; a constriction develops in the air tube (the glottis), which narrows in expiration. . . . [Full Text PDF of this Article]

Author Affiliations
LINCOLN, NEB.

From the Veterans' Administration.

Footnotes
Published with the permission of the Medical Director of the United States Veterans' Administration, who assumes no responsibility for the opinions expressed or the conclusions drawn by the writer.

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?