Archive image from page 172 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 TERATOLOGY. 957 the mouth. In cerebral hernia the chance for the prolongation of life is greater. Some cases are known in which life lasted 20, 30, and even 60 years. When complicated with hydrocephalus, puncture has sometimes been instituted, but without success (Earle). Extirpation produced, in another case, in- stantaneous death. What are the causes of acrania ? From some of its forms, it is clear that there has been hydrocephalus followed by disruption
Archive image from page 172 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 TERATOLOGY. 957 the mouth. In cerebral hernia the chance for the prolongation of life is greater. Some cases are known in which life lasted 20, 30, and even 60 years. When complicated with hydrocephalus, puncture has sometimes been instituted, but without success (Earle). Extirpation produced, in another case, in- stantaneous death. What are the causes of acrania ? From some of its forms, it is clear that there has been hydrocephalus followed by disruption (Morgagni, Penada, Sandifort, Klein, Otto). In an embryo figured by M. Schroeder Van der Kolk, the summit of the head is extended by hydrocephalus, and has on its superior surface a black gangrenous spot which seems to prognosticate a rupture. In another foetus I observed a fissure in the midst of an analogous spot. According to my opinion, the lacerated bags, which are sometimes found on or in the summit of the naked internal surface of the basis cranii, or at the back part of the more developed skull, are caused by such ruptures. Tiedemann gives a description of such a bag, filled with serous fluid, but not yet burst, and situated upon the head of a fetus, which has the ex- ternal appearance of acrania. (Fig. 612.) Fig. 612. But in those cases in which the flat basis of the skull is only covered with a membrane and with cerebral nerves, in those in which there is a spongy substance upon it, and in those in which the skull, although flat, is otherwise complete, not the least probability exists of the rupture of a cerebral vesicle at an early period of formation. I am able to prove this, I think, by a small foetus of two months, in which the superior part of the skull is wanting, and in which a spongy mass occupies the place of the brain. It shows that acrania may also be a pri- mitive malformation, occasioned by the simul- taneous malformation of the brain and of the skul
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