A manual of diseases of the ear / by George P. Field.

  • Field, George P (George Purdey)
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: A manual of diseases of the ear / by George P. Field. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    DISEASES OE THE EAE. Chapter I. AKATO]\IY OF THE EAE. In order that the practitioner may be enabled to appreciate the meaning and value of the various symptoms which spring from pathological changes in the different parts of the organ of hear- ing, a practical knowledge of the anatomy of the healthy ear must be premised. The relative position of adjoining and neighbovning structures must be kept constantly in view ; nor should it be forgotten that areas which are apparently distant from the seat of disease may yet be in close anatomical re- lationship through the medium of nervous, vascular, lymphatic, or other connection. The following brief description of the ear, whilst laying no claim to scientific merit, may yet be of value in recalling or suggesting certain anatomical details to some few of those who may not be disinclined to dip further into the pages on Diseases of the Ear. The organ of hearing consists of three distinct parts, named from their relative position the external, middle, and internal ear. The External Ear. The external ear commences in the expanded pinna, Avhich consists of yellow cartilage covered by delicate skin. By this trumpet-shaped expansion many, but by no means all, of the sound-waves are collected, to be conducted by the column of air B