. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. this monstrosity, fg. 611. the structure of the skull. Fig. a, frontal; b, parietal; c, occipital, bones. In many of the published observations, a collection of serous fluid accompanied the hernia cerebri, by which a hydro-encephaloccfe was formed. The situation of the cerebral hernia is in general on the occiput, but sometimes on both sides of the root of the nose (W. Lyon, Kelch) ; above the eye (Adams); on the forehead (Beclard, Saxtorph, Niemeyen, Bredon, Guyenot) ; on the fontanella magna (Held) ; in the parie
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. this monstrosity, fg. 611. the structure of the skull. Fig. a, frontal; b, parietal; c, occipital, bones. In many of the published observations, a collection of serous fluid accompanied the hernia cerebri, by which a hydro-encephaloccfe was formed. The situation of the cerebral hernia is in general on the occiput, but sometimes on both sides of the root of the nose (W. Lyon, Kelch) ; above the eye (Adams); on the forehead (Beclard, Saxtorph, Niemeyen, Bredon, Guyenot) ; on the fontanella magna (Held) ; in the parietal bone (Le Dran, Stein, Tren) ; on the glabella, between the orbits (Otto). On a survey of these various types, it ap- pears that they all belong to the same class of monstrosities. The nature of the malform- ation is in all the same, namely a defective de- velopement of the skull and of the brain. This takes place in different degrees, so as to convey us gradually from the complete want of brain to those cases in which it is nearly perfect, and differing from the natural condition only in situation. The constancy of form is very interesting in this monstrosity, so that the malformed children resemble each other nearly in every museum, and the pub- lished observations are quite accordant with the cases now occasionally occurring. This proves that the origin of the malformation cannot be accidental. The want of the neck, which is the reason why the ears rest on the shoulders and the chin on the breast, and which gives to this form of monstrosity such a pecu- liar character, is often the consequence of the want of some of the cervical vertebrae (Rathke, Haller, Otto), or of their mutual coalition (Rathke, W. Vrolik), or of their shortness (Sandifort.) As a transition to the brute form, this shortness of the neck is interest- ing, reminding us of the condition of the Cetacea. The prominence of the eyes is oc- casioned by the flatness of the orbits, and by the backward direction
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