The diseases of the ear and their treatment . s, and onexamination the membranes were found to be perforated. Treatment consists in the removal of the effused blood bymeans of Politzers method after paracentesis of the membrane, ifnot perforated previously ; the ear should also be syringed with anantiseptic fluid. If the haemorrhage be followed by inflammatorysymptoms, cold should be applied in the form of compresses. 1 Bericht über den 2. internationalen otolog. Congress in Mailand, Zeitschriftfür Ohrenheilkunde, vol. ix. p. 407. CHAPTER OF THE INTERNAL EAR. ANATOMICAL. The osseou
The diseases of the ear and their treatment . s, and onexamination the membranes were found to be perforated. Treatment consists in the removal of the effused blood bymeans of Politzers method after paracentesis of the membrane, ifnot perforated previously ; the ear should also be syringed with anantiseptic fluid. If the haemorrhage be followed by inflammatorysymptoms, cold should be applied in the form of compresses. 1 Bericht über den 2. internationalen otolog. Congress in Mailand, Zeitschriftfür Ohrenheilkunde, vol. ix. p. 407. CHAPTER OF THE INTERNAL EAR. ANATOMICAL. The osseous labyrinth is formed of exceedingly dense bone, ashard as ivory, and is enclosed in the more porous substance of thepetrous bone. It contains the cavities designated as the vestibule,the cochlea, and the se?nici?cular canals, in which is situated themembranous labyrinth, bathed inside as well as outside by thelabyrinthine fluid, the endo-lymph, and the peri-lymph respectively. The vestibule forms an oval cavity divided into two parts by a. perpendicular ledge, crista vestibuli, extending along the internalwall, namely, the recessus sphericus or fovea hemispherica {saccult) infront, and the recessus ellipticus or fovea hemi-elliptica iutriculi)behind. The external wall of the vestibule separates it from the 2o8 DISEASES OF THE INTERNAL EAR. tympanic cavity, and in this wall is situated the fenestra ovalis( Fig. 41), in which the foot-plate of the stapes is fastened bymeans of the annular ligament. In the internal wall of the vesti-bule are small orifices {macules), through which the branches of thevestibular nerve enter. The three semicircular canals, which areall situated at right angles to each other, communicate with theposterior part of the vestibule by five apertures. We distinguishthe semicircular canals as follows—a horizontal (external) , andtwo vertical, the frontal (superior) , and the sagittal (posterior) These different canals commence with a dil
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