File:Diseases of the ear - a text-book for practitioners and students of medicine (1900) (14762986301).jpg

Identifier: diseartex00denc (find matches)
Title: Diseases of the ear : a text-book for practitioners and students of medicine
Year: 1900 (1900s)
Authors: Dench, Edward Bradford, 1864-1936
Subjects: Ear
Publisher: New York : D. Appleton and Company
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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ony margin of the hardpalate, the fibres uniting with those of the opposite side inthe median raphe. TJie levator palati springs from the quadrilateral surfaceon the inferior aspect of the petrous bone, near its apex; andpasses downward, forward, and inward to its insertion on theposterior and superior surface of the soft palate. The bodyof the muscle lies along the inferior margin of the cartilagi-nous plate which forms the posterior wall of the tube, towhich it is loosely attached. It is also in contact with thefibrous inferior wall. A third muscle, sometimes included in this group, is thesalpingo-pharyngeus, a muscular slip, which runs from thebody of the palato-pharyngeus upward and forward to beinserted into the inferior wall of the tube. The Arteries (Plate I) of the conducting apparatus are de-rived chiefly from the external carotid artery, although a fewbranches spring from the internal carotid. The branches olthe external carotid supplying the auricle, canal, and middle PLATE
Text Appearing After Image:
The Arterial Supply of the Conducting Apparatus. THE ARTERIES. 29 ear are the posterior auricular, the superficial temporal, theoccipital, the internal maxillary, and the ascending pharyn-geal. The posterior auricular is distributed to the posterior por-tion of the auricle and the corresponding part of the meatus.Through the stylomastoid branch which enters the stylo-# mastoid foramen it supplies the mastoid cells, and sends aspecial branch to the stapedius muscle and to the stapes. Itanastomoses with the superficial petrosal of the middle me-ningeal artery within the tympanic cavity, and with the tym-panic branch of the internal maxillary, forming with this lat-ter a complete vascular circle about the inner extremity ofthe meatus. The superficial temporal, through the superior and infe-rior anterior auricular arteries, supplies the anterior portionof the pinna and canal, the vessels anastomosing with thebranches of the posterior auricular artery; it also sends asmall branch to the ty

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