Diseases of the nose, throat and ear / by Charles Huntoon Knight and W. Sohier Bryant.

  • Knight, Charles H. (Charles Huntoon), 1849-1913.
Date:
1909
Catalogue details

Licence: Public Domain Mark

Credit: Diseases of the nose, throat and ear / by Charles Huntoon Knight and W. Sohier Bryant. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    DISEASES OP^ME^IOSE, THROAT AND EAR. THE NOSE. CHAPTER I. ANATOMY AND PHYSIOLOGY OF THE NASAL PASSAGES. METHODS OF EXAMINATION. INSTRUMENTS AND APPARATUS. ANATOMY. The nasal cavities are separated by a median partition, the septum, composed in front of cartilage and above and behind of bone—the perpendicular plate of the ethmoid, or mesethmoid, and the vomer. The shape and dimensions of the cartilaginous septum influence greatly the contour of the nose and the facial expression. This car- tilage is quadrangular, its anterior margin forming the outline of the nose, and being joined in front to the lateral cartilages, which to- gether form the alae and tip of the nose. The nasal bones and the nasal processes of the superior maxillae complete the framework of the external nose. The septal cartilage articulates above and behind with the anterior margin of the perpendicular plate of the ethmoid, below with the vomer and the bony ridge formed by the junction of the palatine processes of the superior maxillae. We rarely, if ever, find the cartilaginous partition between the nostrils exactly vertical for two reasons. The prominence of the nose renders it particularly liable to blows and injuries, and the development of the cartilage frequently progresses long after the bones of the face have become consolidated, hence a bending or distortion of the cartilage results. In consequence we meet with a great variety of deformities of the cartilage which will be more fully considered elsewhere. The posterior portion of the septum, being composed of bone and occupying a more protected situation, is relatively exempt from violence, so that we but seldom observe any displacement or asym- metry of the posterior margin of the vomer, no matter what degree