A text-book of the diseases of the ear and adjacent organs . n to the opposite wall of theniche. Prussaks space communicates on one side with the upper part of theattic, on the other with the posterior pocket of the meinbrana tympani, andopens into the tympanum at the posterior part by a small round or slit-like INTRA-TYMPANIC MUSCLES. 33 opening, which is hidden by the incus. The external attic, the anatomicalrelations of which will be made clear by the accompanying cut (Fig. 37), isoccasionally the seat of a protracted suppuration, with perforation of Shrap-nelTs membrane. h. Intra-tympanic
A text-book of the diseases of the ear and adjacent organs . n to the opposite wall of theniche. Prussaks space communicates on one side with the upper part of theattic, on the other with the posterior pocket of the meinbrana tympani, andopens into the tympanum at the posterior part by a small round or slit-like INTRA-TYMPANIC MUSCLES. 33 opening, which is hidden by the incus. The external attic, the anatomicalrelations of which will be made clear by the accompanying cut (Fig. 37), isoccasionally the seat of a protracted suppuration, with perforation of Shrap-nelTs membrane. h. Intra-tympanic Muscles. The tensor tympani arises in front of the anterior orifice of the canal is protens, tymp. on the osseous wall of the pyramid adjacent to the carotid canal,and from the cartilaginous Eustachian tube. The rounded tendon of thispenniforrn muscle leaves the canal at the rostrum cochleare, extends in adirection almost at right angles to the belly of the muscle across the tympaniccavity (Fig. 38), and is inserted on the inner margin of the handle of the. Fig. 36.—System of Cavities betweenthe Membkana Tympani and theNeck of the Malleus.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
