Operative surgery . Fig. 294.—Transverse section of mastoid process showing the cells, tlie iipiier largest onebeing the mastoid antrum. Note its relation to the external auditory meatus. Theupper and outer sharp point of the reflected bone flap is a portion of the meatalspine. The supra-meatal spine placed at the upper margin of the bony meatusis found in 82 per cent of 3^oung and 87 per cent of adult sul^jects. This. Pig. 395.—Reflected portion of mastoid cells removed, showing mastoid antrum abovecommunicating with attic, seen through the window caused by separation of thehalves of bone. No
Operative surgery . Fig. 294.—Transverse section of mastoid process showing the cells, tlie iipiier largest onebeing the mastoid antrum. Note its relation to the external auditory meatus. Theupper and outer sharp point of the reflected bone flap is a portion of the meatalspine. The supra-meatal spine placed at the upper margin of the bony meatusis found in 82 per cent of 3^oung and 87 per cent of adult sul^jects. This. Pig. 395.—Reflected portion of mastoid cells removed, showing mastoid antrum abovecommunicating with attic, seen through the window caused by separation of thehalves of bone. Note the thinness of the bony roof of the attic, the Fallopian canal,external auditory walls, and the relations of the important intracranial parts tothose without. spine is an important guide to the upper margin of the bony meatus (), to the mastoid antrum, and to the lower limits of the middle cerebral 264 OPERATIVE SURGERY.
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Keywords: ., bookauthorbryantjosephdjosephde, bookcentury1900, bookdecade1900
