Syllabus of the course of lectures on the principles and practice of surgery: delivered in the Jefferson Medical College, Philadelphia (Part 3).

  • Mütter, Thomas D. (Thomas Dent), 1811-1859.
Date:
1843
Catalogue details

Licence: Public Domain Mark

Credit: Syllabus of the course of lectures on the principles and practice of surgery: delivered in the Jefferson Medical College, Philadelphia (Part 3). Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    PROFESSOR MUTTER'S SYLLABUS OE LECTURES. IV. DISEASES OF THE EAR. Anatomy of Ear.—Divided into external, middle, and internal ear. The exter- nal ear consists of the auricle, and the meatus auditorius externus. The middle ear consists of the tympanum and its appendages, namely, the membrana tym- pani; the four ossicula auditus with their ligaments and muscles; the eustachian tube; and the mastoid cells. The internal ear, or labyrinth as it is termed, from its complexity of organi- zation, is divided into bony and membranous labyrinth—the bony is sub-divided into vestibule, three semicircular canals, and the cochlea—the membranous labyrinth is found within the semicircular canals and the vestibule and contains the thin serous fluid called liquor cotunnii. MALFORMATIONS OF THE EAR. MALFORMATIONS OF THE AURICLE. Cases most frequently met with.—1. Deficiency of helix, and sometimes its division from the lobus. 2. An entire absence of the lobus—its division by a slit into an anterior and posterior portion—or its attachment wholly or partially to the integuments of the side of the head. 3. The tragus and anti-tragus are sometimes united, or inverted so as to partially close the opening of the meatus. 4. The total absence of the auricle. 5 An enormous enlargement of the auricle. Causes.—1. Congenital. 2. Acquired, from wounds, bites, ulceration, sloughing—an increase in size is often the result of manipulation, or of the dress stretching the part. 16