. A treatise on the diseases of infancy and childhood. antity of fluid is more thansufficient to supply the deficiency. Anatomical Characters.—According to M. Breschet thefluid in congenital hydrocephalus may be, 1st, between the duramater and the cranium; 2d, between the dura mater and the parie-tal arachnoid; 3d, in the cavity of the arachnoid; 4th, in theventricles; 5th, between the arachnoid and the brain. In a large majority of hydrocephalic patients the seat of theeffusion is the ventricles. As the quantity of fluid increases, thepressure from within gradually unfolds the convolutions of
. A treatise on the diseases of infancy and childhood. antity of fluid is more thansufficient to supply the deficiency. Anatomical Characters.—According to M. Breschet thefluid in congenital hydrocephalus may be, 1st, between the duramater and the cranium; 2d, between the dura mater and the parie-tal arachnoid; 3d, in the cavity of the arachnoid; 4th, in theventricles; 5th, between the arachnoid and the brain. In a large majority of hydrocephalic patients the seat of theeffusion is the ventricles. As the quantity of fluid increases, thepressure from within gradually unfolds the convolutions of thebrain, at the same time producing expansion of the cranial the amount of fluid is considerable, and it becomes so inthe course of a few weeks or months, the hemispheres are spreadout in a thin lamina on either side, gradually decreasing in thick-ness from the base of the cranium to the vertex, where the brainsubstance is sometimes so thin as to be scarcely absence of brain in this situation, namely, at the vertex,. CoDgeoital hydrocephalus. (Prom Gross.) even in extreme cases of expansion and flattening of the hemis-pheres from the pressure of the liquid is rare, though the brain ANATOMICAL CHARACTERS. 113 substance at this point is sometimes almost as thin as either ofthe membranes, so that the wall of the sac is translucent. Themembranes which surround the brain do not usually undergo anyalteration, except such as arises from the distension. The falxcerebri sometimes disappears, and sometimes the meninges presenta whiter hue from maceration than in health. The distension alsocauses such an expansion of the pia mater that it becomes verythin, and in places scarcely visible, but its presence in everypoint can be demonstrated. The changes which the cranial bones undergo, both in theirchemical character and in their shape in hydrocephalic patients,if the amount of fluid is considerable, are interesting and remark-able. The base of the cranium
Size: 1456px × 1716px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublish, booksubjectchildren
