. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. THE EAR. 177 The fibro-cartilage is an oval, elastic plate, of a yellowish colour, and attached by an anterior ligaifient, which is triangular, broad, and strong, to the zygomatic process, and by ihe posterior ligament to the mastoid process. The muscles are, the Tuajor helicis^ which is narrow, about half an inch long, thin, and situated at the arched superior and anterior part of the helix, its fibres being vertica
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. THE EAR. 177 The fibro-cartilage is an oval, elastic plate, of a yellowish colour, and attached by an anterior ligaifient, which is triangular, broad, and strong, to the zygomatic process, and by ihe posterior ligament to the mastoid process. The muscles are, the Tuajor helicis^ which is narrow, about half an inch long, thin, and situated at the arched superior and anterior part of the helix, its fibres being vertical. The Tninar helicis is very small, and situated at the inferior and posterior arch of the helix. The tragicus is three-cornered, tolerably thick, with vertical fibres, upon the tragus. The antitragicus is narrow and short, and passes from the antitragicus to the antihelix. The transversus auriculce,^ is trans- verse on the posterior surface of the ear, extending from the con- vexity of the concha to the external part of the antihelix. The dilatator conchce extends from the meatus auditorius to the anterior part of the tragus, which it draws forwards, and thus dilates the concha. The obliquvs aitriculcE is upon the internal surface of the ear, between the elevations of the fossa innominata and the concha. The meatus^ is a cartilaginous tube, lining a bony canal, of about one inch in length, narrow in the middle, and curved downwards; the skin Uning it is covered with hairs, and glands secreting wax. The middle ear or tympanum}' is an irregular, bony cavity, in the petrous portion of the temporal bone, and bounded in front by the membrana tympani. It is filled with air, which enters by the Eustachian tube f and contains a chain of small bones, and open- ings into the mastoid cells. ^ Membrana tympani.—The drum of the ear is a thin, semi-tf ans- Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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