. The Journal of nervous and mental disease. ion in the bones of the calvarium due tothe Pacchionian bodies. He also states that hydrocephalus and in-tracranial growths lead to atrophy of the calvarium, but does notcite any cases. In the first place, we are dealing with a somewhat different con-dition than arterial aneurysmal erosions. It is difficult to imaginethe same amount of pressure and pulsation present in a cavity likethe cranium. Bergmann (2) has shown, in a woman with a de-fective skull, that the brain expands within its cavity synchronouslywith each cardiac systole. Furthermore, tha
. The Journal of nervous and mental disease. ion in the bones of the calvarium due tothe Pacchionian bodies. He also states that hydrocephalus and in-tracranial growths lead to atrophy of the calvarium, but does notcite any cases. In the first place, we are dealing with a somewhat different con-dition than arterial aneurysmal erosions. It is difficult to imaginethe same amount of pressure and pulsation present in a cavity likethe cranium. Bergmann (2) has shown, in a woman with a de-fective skull, that the brain expands within its cavity synchronouslywith each cardiac systole. Furthermore, that it expands with ex-piration due to the pressure in the right side of the heart dammingthe blood back into the sinuses; while the contrary takes place ininspiration. The brain is unlike the kidney in the latter respect be-cause of the absence of efficient valves in the cranial and vertebralveins, and the continuity of these veins with the right auricle andvena cava. Cramer (3) first recorded the venous pressure and EROSION OF THE SKULL 435. Fig. I. Shows the inner surface of the calvarium with the dura attachedby firm, thick adhesions that are torn away with difficulty. In the region ofthe bregma can be seen the varix in the superior sagittal sinus. This varixis 2 cm. in diameter and extends outward through the dura and internal table,to the external table, where it has caused irregular erosion of bone. It willbe seen that the sinus opens directly into this, and the varix is lined through-out with the ordinary endothelial coat. When the dura is removed the pri-mary erosion, cm. in diameter, is found extending through the internaltable into the diploe. At the anterior and posterior edges are seen diverticuliwhich lead off into the diploic space. Through this opening can be seen theirregularly eroded outer table. The spaces for the meningeal vessels aredeeply grooved, and on the left there is a minute erosion through the innertable. In the frontal region, especially on the l
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpsychologypathologic
